Halucynacje i słyszenie głosów
Etiologia i przyczyny

Halucynacje słuchowe, definiowane jako percepcje dźwiękowe bez zewnętrznego bodźca, mają złożoną etiologię obejmującą czynniki biologiczne, psychologiczne i środowiskowe. Występują najczęściej w schizofrenii (75-80% pacjentów), gdzie mają charakter negatywny i krytyczny, ale także w chorobie afektywnej dwubiegunowej (20-50%), PTSD (~40%), zaburzeniach lękowych (~14%) i ciężkiej depresji (~10%). Neuroobrazowanie (PET, fMRI) wskazuje na zwiększoną aktywność w jądrach prążkowia, wzgórzu, regionach paralimbicznych i podwzgórzu oraz zaburzenia funkcji lewego płata skroniowego. Patofizjologia obejmuje dysfunkcje receptorów dopaminowych D2, serotoninowych 5HT2a oraz glutaminergicznych, a także zaburzenia równowagi między układem limbicznym a korą przedczołową (model VOICE). Modele neurokognitywne sugerują, że halucynacje wynikają z błędnego przypisywania wewnętrznych zdarzeń poznawczych źródłom zewnętrznym, co jest związane z deficytami w monitorowaniu mowy wewnętrznej i przetwarzaniu motoryczno-sensorycznym.

Etiologia halucynacji i słyszenia głosów

Halucynacje i słyszenie głosów to zaburzenia percepcji, w których osoba doświadcza wrażeń zmysłowych bez zewnętrznego bodźca. Zjawisko to ma złożoną etiologię, a przyczyny jego występowania są wielorakie i nie zawsze związane z chorobą psychiczną. Chociaż dokładny mechanizm powstawania halucynacji słuchowych nie został w pełni poznany, badania wskazują na udział wielu czynników biologicznych, psychologicznych i środowiskowych12.

Zaburzenia psychiczne jako przyczyna halucynacji słuchowych

Halucynacje słuchowe są często kojarzone z zaburzeniami psychotycznymi, ale mogą występować również w innych jednostkach chorobowych. Schizofrenię uważa się za główną przyczynę halucynacji słuchowych, które występują u około 75-80% osób z tym rozpoznaniem34. Halucynacje słuchowe w schizofrenii mają zazwyczaj formę głosów, które mogą komentować zachowanie pacjenta, prowadzić dialog między sobą lub wydawać polecenia5.

Poza schizofrenią, halucynacje słuchowe występują również w innych zaburzeniach psychicznych6:

  • Choroba afektywna dwubiegunowa – u 20-50% pacjentów
  • Zespół stresu pourazowego (PTSD) – u około 40% pacjentów
  • Zaburzenia lękowe – u około 14% osób
  • Ciężka depresja – u około 10% osób

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W zaburzeniach psychotycznych, takich jak schizofrenia, halucynacje słuchowe są zazwyczaj bardziej złożone, częstsze i mają większy wpływ na funkcjonowanie pacjenta niż w przypadku osób bez zaburzeń psychicznych9. W schizofrenii głosy często mają negatywny, krytyczny lub zagrażający charakter, w przeciwieństwie do halucynacji występujących u osób bez zaburzeń psychicznych, które są zwykle bardziej neutralne lub pozytywne10.

Neurobiologiczne podłoże halucynacji słuchowych

Badania z wykorzystaniem technik neuroobrazowania, takich jak pozytronowa tomografia emisyjna (PET) i funkcjonalny rezonans magnetyczny (fMRI), wskazują na zwiększoną aktywność w strukturach podkorowych (jądra prążkowia i wzgórza), regionach paralimbicznych i podwzgórzu u pacjentów ze schizofrenią doświadczających halucynacji11. Ponadto, analizy wykazują zaburzenia funkcjonowania lewego płata skroniowego, który odgrywa kluczową rolę w przetwarzaniu mowy1213.

Dokładny mechanizm powstawania halucynacji słuchowych pozostaje jednak niejasny. Proponowane modele neurokognitywne sugerują, że halucynacje mogą być wynikiem14:

  • Spontanicznej aktywacji sieci słuchowej, obejmującej lewy górny zakręt skroniowy, zakręty skroniowe poprzeczne (zakręty Heschla) i lewy płat skroniowy
  • Zaburzenia równowagi pomiędzy nadmierną aktywacją układu limbicznego a niedostateczną aktywnością hamującą kory przedczołowej (model VOICE)
  • Spontanicznego wyładowania neuronów czuciowych bez odpowiednich mechanizmów hamujących
  • Zmian w szlakach wzgórzowo-migdałowych, co wpływa na przetwarzanie emocjonalne reakcji na halucynacje słuchowe

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Na poziomie neurochemicznym, szczególnie istotną rolę w powstawaniu halucynacji słuchowych odgrywają receptory dopaminowe (D2) i serotoninowe (5HT2a). Badania neuroobrazowe wykazały zwiększone zajęcie receptorów D2 w układzie prążkowia oraz receptorów 5HT2a w jądrze ogoniastym17. W schizofrenii istnieją dowody na to, że bardzo wysokie poziomy dopaminy w układzie limbicznym odgrywają główną rolę w powstawaniu halucynacji i urojeń18.

Oprócz zaburzeń dopaminergicznych, w patofizjologii halucynacji może uczestniczyć również nieprawidłowa neurotransmisja cholinergiczna. Ponadto, serotonina również została powiązana z powstawaniem halucynacji, co opiera się na fakcie, że wiele substancji halucynogennych, takich jak LSD, meskalina, psylocybina i ekstazy, działa jako agonisty lub częściowe agonisty receptorów serotoninowych 5-HT2A19.

Potencjalną rolę glutaminianu w halucynacjach sugeruje odkrycie, że antagoniści glutaminianu, takie jak fencyklidyna i ketamina, mogą indukować halucynacje. Teoria glutaminianowa, proponowana jako możliwa przyczyna schizofrenii, może mieć również implikacje w przypadku halucynacji słuchowych, które są podejrzewane o wywołanie przez zmienioną transmisję glutaminergiczną2021.

Uwarunkowania psychologiczne i poznawcze

Najnowsze modele halucynacji zakładają, że są one związane z błędnym przypisywaniem wewnętrznych zdarzeń poznawczych do źródeł zewnętrznych22. Niektóre badania dostarczają dowodów na koncepcję Bentalla, że osoby doświadczające halucynacji mają zaburzoną zdolność rozróżniania między zdarzeniami rzeczywistymi a wyobrażonymi, wykazując szczególne skłonności do przypisywania swoich myśli źródłom zewnętrznym23.

Morrison zgadza się z teorią, że halucynacje są wewnętrznymi zdarzeniami poznawczymi, które są błędnie przypisywane źródłom zewnętrznym24. Zgodnie z teorią internalizacji mowy wewnętrznej, zaburzenie może wystąpić podczas normalnego procesu internalizacji głosu wewnętrznego, gdy osoba nie interpretuje własnego głosu jako należącego do niej25.

Alternatywnie, zaburzenie może wystąpić podczas procesu ponownej eksternalizacji głosu wewnętrznego, co skutkuje pozornym drugim głosem, który wydaje się obcy dla jednostki26. Ta zaburzona percepcja swojego wewnętrznego głosu może wyjaśniać, dlaczego niektóre osoby doświadczają halucynacji słuchowych jako głosów zewnętrznych.

Czynniki neurologiczne i medyczne

Halucynacje słuchowe mogą być również objawem różnych stanów neurologicznych i medycznych2728:

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Problemy ze słuchem również mogą przyczyniać się do powstawania halucynacji słuchowych. Badania wskazują, że halucynacje słuchowe występują u około 16% dorosłych z upośledzeniem słuchu i mogą przybierać dwie formy: proste halucynacje (szumy uszne) i złożone halucynacje (mowa i muzyka)33. Osoby z utratą słuchu w jednym lub obu uszach mogą słyszeć różne dźwięki, muzykę lub głosy, których w rzeczywistości nie ma34.

Inne czynniki i przyczyny sytuacyjne

Halucynacje słuchowe mogą być również wywołane przez różne tymczasowe stany i sytuacje35:

Używki i substancje psychoaktywne:

  • Alkohol – zarówno nadmierne spożycie, jak i zespół odstawienia (delirium tremens)36
  • Narkotyki rekreacyjne, takie jak LSD, kokaina, amfetaminy, PCP, ketamina i marihuana37

Czynniki fizjologiczne:

  • Brak snu lub zaburzenia snu – halucynacje hipnagogiczne (podczas zasypiania) i hipnopompiczne (podczas budzenia się)38
  • Skrajny głód lub niedożywienie39
  • Wysoka gorączka40

Czynniki psychologiczne:

  • Ekstremalny stres lub żałoba – silne negatywne emocje mogą zwiększać podatność na halucynacje4142
  • Izolacja społeczna43
  • Trauma psychiczna44

Inne czynniki medyczne:

  • Efekty uboczne niektórych leków (jako działanie niepożądane)4546
  • Okres po znieczuleniu ogólnym po operacji lub zabiegu47
  • Niedobory witamin, w tym witaminy D i B1248

Mechanizmy powstawania halucynacji słuchowych

Nieprawidłowości w przetwarzaniu sensorycznym

Badania neuroobrazowe wykazały, że halucynacje powodują aktywację obszarów mózgu specyficznych dla modalności sensorycznej, zaangażowanych w normalną percepcję49. W przypadku halucynacji słuchowych aktywowane są obszary odpowiedzialne za przetwarzanie mowy i języka50.

Zakłada się, że normalne ścieżki neuronalne zaangażowane w percepcję i produkcję mowy, które są zlateralizowane do lewego płata skroniowego, również leżą u podstaw halucynacji słuchowych51. Percepcja halucynacji słuchowych odpowiada doświadczeniu rzeczywistego słyszenia zewnętrznego, pomimo braku jakiegokolwiek dźwięku52.

Najnowsze badania wskazują, że zaburzenia transformacji motoryczno-sensorycznej mogą pośredniczyć w powstawaniu halucynacji słuchowych. Teoria zakłada, że selektywne upośledzenie funkcjonalnie odmiennych sygnałów wyładowania korowego (CD) i kopii eferentnej (EC) podczas przekształcania sygnałów motorycznych na sensoryczne powoduje pozytywne objawy halucynacji53.

Według tego modelu, objawy słuchowych halucynacji werbalnych (AVH) są zapośredniczone przez upośledzoną funkcję monitorowania źródła CD, co skutkuje brakiem hamowania odpowiedzi słuchowych w ogólnym przygotowaniu mowy, a także nieprecyzyjną funkcją aktywacji EC, co prowadzi do zróżnicowanego wzmocnienia i uwrażliwienia kory słuchowej podczas specyficznego przygotowania mowy54.

Zaburzenia integracji między obszarami mózgu

Niektóre badania sugerują, że pacjenci ze schizofrenią cierpią na zmniejszoną łączność mózgową55. Ta koncepcja opiera się na hipotezie, że halucynacje słuchowe mogą wynikać z zaburzeń komunikacji pomiędzy różnymi obszarami mózgu, co prowadzi do nieprawidłowego przetwarzania informacji sensorycznych i poznawczych.

Funkcjonalne badania MRI wykazały, że u osób doświadczających halucynacji słuchowych występuje zmieniona aktywacja obszarów mózgu odpowiedzialnych za przetwarzanie języka i pamięć werbalną krótkotrwałą, a nie obszarów słuchowych56. To odkrycie kwestionuje tradycyjne modele, które zakładają, że halucynacje słuchowe są wynikiem nieprawidłowej aktywności w korze słuchowej.

Zamiast tego, dane te sugerują, że halucynacje słuchowe mogą być manifestacją zaburzeń w mechanizmach, które normalnie uczestniczą w przetwarzaniu mowy, takich jak obszar Broki i Wernickego57. Ponieważ pamięć krótkotrwała werbalna w pewnym stopniu odpowiada koncepcji mowy wewnętrznej, te odkrycia można interpretować jako poparcie dla teorii Fritha o błędnie oznakowanej mowie wewnętrznej jako przyczynie halucynacji słuchowych58.

Czynniki emocjonalne i społeczne

Podwyższony poziom emocji może odgrywać rolę w powstawaniu głosów59. Badania wskazują, że wzgórze i ciało migdałowate, struktury zaangażowane w przetwarzanie emocji, mogą być nadmiernie aktywne podczas halucynacji słuchowych, co sugeruje, że komponenty emocjonalne mogą wpływać na powstawanie i treść halucynacji60.

Deprywacja społeczna, a dokładniej brak interakcji społecznych i rozmów, może zwiększać prawdopodobieństwo produkcji halucynowanych rozmów przez mózg61. Hipoteza ta sugeruje, że izolacja społeczna może być czynnikiem ryzyka dla rozwoju halucynacji słuchowych.

Traumatyczne doświadczenia życiowe, szczególnie te, które miały miejsce we wczesnym okresie życia pacjenta, mogą przyczyniać się do rozwoju halucynacji słuchowych62. Według tej hipotezy, głosy mogą być wynikiem traumatycznego incydentu, który miał miejsce we wczesnym życiu pacjenta, a słyszenie jednego lub więcej głosów może być rezultatem doświadczenia zaburzenia dysocjacyjnego63.

Predyspozycje do doświadczania halucynacji słuchowych

Czynniki genetyczne i strukturalne

Badania sugerują, że podatność na rozwój „słyszenia głosów” może być związana z odchyleniami w organizacji układu słuchowego, które występują w okresie niemowlęcym i poprzedzają rozwój mowy oraz wystąpienie objawów psychotycznych o wiele lat64. Mapy tonotopiczne, które organizują się, gdy ludzie są jeszcze niemowlętami i pozostają stabilne przez całe życie, mogą być kluczowym czynnikiem w rozwoju tej podatności65.

Choroba psychiczna często występuje rodzinnie. Chociaż istnieją znane przypadki, w których wykazano, że słyszenie głosów jest dziedziczone w rodzinie, nie ma jasnej przyczyny genetycznej. Cechy, które występują w rodzinie, mogą być również spowodowane grupowaniem się traumatycznych doświadczeń w tej rodzinie66.

W badaniu z 2021 roku naukowcy zauważyli szereg czynników w schizofrenii, które mogłyby być zaangażowane poza tymi wpływającymi na obszary słuchowe i językowe mózgu. Czynniki te obejmują genetykę, zmiany w poziomach glutaminianu (neuroprzekaźnika, który przesyła wiadomości w mózgu i nerwach), zmiany elektroencefalograficzne w mózgu, zmiany w istocie białej mózgu oraz strukturę korową67.

Podatność indywidualna i czynniki ryzyka

Badania wskazują, że mechanizmy leżące u podstaw halucynacji są obecne w mózgu każdego człowieka, ale z jakiegoś powodu niektóre osoby są bardziej podatne na ich występowanie niż inne68. Ta podatność może wynikać z kombinacji czynników genetycznych, neurobiologicznych i środowiskowych.

Szacuje się, że 5-10% wszystkich ludzi czasami słyszy głosy – na przykład zmarłych krewnych lub wyższych istot – bez posiadania jakiejkolwiek choroby69. Oznacza to, że zjawisko to nie ogranicza się do osób z zaburzeniami psychicznymi, jak się powszechnie zakłada.

Granica między nieszkodliwymi a patologicznymi halucynacjami jest płynna. Jednym z kryteriów może być to, czy słyszenie głosów negatywnie wpływa na życie ludzi, powodując na przykład samookaleczenie lub uniemożliwiając prowadzenie autonomicznego życia. Z drugiej strony, głosy mogą być nieszkodliwe lub nawet dobroczynne – na przykład jeśli ktoś słyszy głos swojej zmarłej babci, która oferuje dobre rady70.

Implikacje kliniczne i terapeutyczne

Diagnostyka różnicowa

Aby zróżnicować przyczyny halucynacji słuchowych, kluczowe jest skupienie się na następujących elementach71:

  • Szczegółowy wywiad medyczny, analizy laboratoryjne i neuroobrazowanie są potrzebne do wykluczenia etiologii organicznych
  • Szczegóły dotyczące używania substancji (nielegalnych i dostępnych bez recepty), profili leków i stosowanych suplementów, aby wykluczyć przyczyny toksyczno-metaboliczne
  • Szczegółowy wywiad rodzinny w kierunku zaburzeń psychicznych, ponieważ wiele chorób psychicznych wykazuje wysoką dziedziczność

Ważne jest, aby pamiętać, że nie wszystkie halucynacje słuchowe są związane z chorobą psychiczną. Mogą one występować z wielu innych powodów, takich jak utrata słuchu, i nie zawsze są oznaką zaburzeń psychicznych72. Dlatego dokładna diagnostyka różnicowa jest niezbędna do ustalenia właściwego rozpoznania i odpowiedniego leczenia.

Podejścia terapeutyczne

Leczenie halucynacji słuchowych zależy od ich przyczyny. Halucynacje spowodowane tymczasowymi stanami, takimi jak skrajny głód lub brak snu, ustąpią po leczeniu lub ustąpieniu podstawowego stanu73.

Lekarze przepisują leki do leczenia halucynacji słuchowych tylko wtedy, gdy są one częścią podstawowego przewlekłego schorzenia74. W przypadku osób z zaburzeniami psychicznymi, które doświadczają halucynacji słuchowych, skuteczna może być psychoterapia (terapia rozmową) w połączeniu z lekami75.

Leki przeciwpsychotyczne są często stosowane w leczeniu halucynacji słuchowych związanych z psychozą. Badania wykazują, że pozytywne objawy schizofrenii dobrze reagują na podawanie neuroleptyków, jednak sama choroba psychotyczna nie76. Oznacza to, że ustąpienie halucynacji niekoniecznie wskazuje na ustąpienie podstawowego zaburzenia myślenia.

Terapia poznawczo-behawioralna (CBT) jest cennym narzędziem pomagającym osobom kwestionować i przeformułowywać niepokojące halucynacje77. W przypadku halucynacji związanych z traumą, może być ważne ponowne odwiedzenie i tworzenie nowych znaczeń wokół tych pierwotnych przyczyn78.

Niektóre badania wykazały, że pacjenci ze schizofrenią, którzy używają alkoholu lub narkotyków, często doświadczają nasilenia halucynacji słuchowych. Podobnie jak w przypadku innych objawów psychotycznych, głosy również nasilają się, gdy chory znajduje się pod presją emocjonalną i psychologiczną, szczególnie jeśli doświadcza otwartej wrogości79.

Znaczenie wsparcia społecznego

Badania wykazały, że wsparcie społeczne jest kluczowym krokiem w procesie zdrowienia dla osób doświadczających halucynacji słuchowych80. Rozmowa z ludźmi pomaga zapewnić odwrócenie uwagi od obraźliwych komentarzy wygłaszanych przez głosy, daje możliwość zebrania innych informacji w celu zakwestionowania nieprzyjemnych rzeczy, które mówią głosy, a niektórzy nawet opisują, że słyszą nieprzyjemne głosy rzadziej, gdy są wśród innych81.

Jednak osoby słyszące głosy mogą napotykać na następujące przeszkody w integracji społecznej82:

  • Trudności podczas rozmów, na przykład koncentracja na czyjejś wypowiedzi przy jednoczesnym słyszeniu głosów jest trudna i męcząca
  • Negatywne oczekiwania dotyczące interakcji, na przykład obawa przed stygmatyzacją i negatywną oceną
  • Trudności w dzieleniu się doświadczeniami głosów, na przykład bezinteresowna obawa, że rozmawianie o głosach sprawi, że inni poczują się zdenerwowani

Dlatego też ważne jest tworzenie bezpiecznych przestrzeni, w których osoby doświadczające halucynacji słuchowych mogą dzielić się swoimi doświadczeniami bez obawy przed osądem lub stygmatyzacją.

Najnowsze badania i perspektywy

Najnowsze badania opublikowane w 2024 roku rzucają nowe światło na jedno z charakterystycznych zjawisk schizofrenii – halucynacje słuchowe83. Naukowcy odkryli, że osoby ze schizofrenią często słyszą głosy i dźwięki, których nie ma – aż 80% osób z tą chorobą psychiczną doświadcza halucynacji słuchowych. Naukowcy teoretyzowali, że dzieje się tak, gdy osoba ze schizofrenią ma trudności z rozpoznaniem wewnętrznej mowy jako wygenerowanej przez siebie84.

Badacze odkryli, że u osób ze schizofrenią występują zaburzone i zakłócone sygnały motoryczne, a wzajemne oddziaływanie tych nieprawidłowych sygnałów prowadzi do halucynacji85. Ta nowa perspektywa może prowadzić do rozwoju nieinwazyjnych technik neuromodulacyjnych, które mogłyby złagodzić halucynacje86.

Inne badania sugerują, że podatność na rozwijanie „głosów” jest prawdopodobnie ustalona wiele lat przed pojawieniem się objawów87. Ponieważ mapa tonotopowa (organizacja częstotliwości dźwięków w korze słuchowej) jest ustalana, gdy ludzie są jeszcze niemowlętami i pozostaje stabilna przez całe życie, wyniki badań sugerują, że podatność na rozwijanie „głosów” jest powiązana z odchyleniem w organizacji układu słuchowego, które występuje w okresie niemowlęcym i poprzedza rozwój mowy oraz początek objawów psychotycznych o wiele lat88.

Badacze mają nadzieję, że głębsze zrozumienie mechanistyczne choroby pomoże również rozszerzyć opcje leczenia poza leki. „Nie można leczyć tego, czego się nie rozumie, a ten brak zrozumienia utrudnił rozwój nowych metod leczenia, które tak naprawdę nie zmieniły się zbytnio w ciągu 40 lat”89.

Według autorów, oprócz pomagania lekarzom w identyfikacji osób, które prawdopodobnie doświadczą halucynacji, zanim objawy wystąpią lub staną się poważne, kora słuchowa może być obszarem do rozważenia dla nowych metod neuromodulacji, które pomogą pacjentom, którzy już mają objawy90.

Podsumowanie etiologii halucynacji słuchowych

Etiologia halucynacji słuchowych i słyszenia głosów jest złożona i wieloczynnikowa. Chociaż dokładne mechanizmy leżące u podstaw tych zjawisk nie są w pełni zrozumiane, badania wskazują na kombinację czynników biologicznych, psychologicznych i środowiskowych91.

W schizofrenii i innych zaburzeniach psychotycznych halucynacje słuchowe są prawdopodobnie wynikiem zaburzeń neurobiologicznych, obejmujących nieprawidłową neurotransmisję dopaminergiczną, serotoninergiczną i glutaminergiczną, a także zaburzenia w funkcjonowaniu obszarów mózgu odpowiedzialnych za przetwarzanie języka i mowy9293.

Czynniki psychologiczne, takie jak trudności w rozróżnianiu między zdarzeniami wewnętrznymi a zewnętrznymi, oraz czynniki społeczne, takie jak izolacja i traumatyczne doświadczenia, również mogą przyczyniać się do rozwoju halucynacji słuchowych9495.

Halucynacje słuchowe mogą występować również w wielu stanach neurologicznych i medycznych, a także mogą być wywołane przez substancje psychoaktywne, leki, brak snu i inne tymczasowe stany9697.

Ważne jest, aby pamiętać, że nie wszystkie halucynacje słuchowe są związane z chorobą psychiczną, a ich występowanie niekoniecznie wskazuje na poważne zaburzenie psychiczne lub neurologiczne98. Dokładna diagnostyka różnicowa jest kluczowa dla ustalenia właściwej przyczyny i odpowiedniego leczenia halucynacji słuchowych.

Najnowsze badania dostarczają nowych perspektyw na mechanizmy leżące u podstaw halucynacji słuchowych i mogą prowadzić do rozwoju bardziej ukierunkowanych i skutecznych interwencji terapeutycznych w przyszłości99100.

Kolejne rozdziały

Zapraszamy do dalszego czytania naszego leksykonu.

Wybierz kolejny rozdział z menu poniżej, aby otworzyć nową podstronę kompedium wiedzy i uzyskać szczegółowe informację o leku, substancji lub chorobie.

  1. 09.04.2026
  2. www.leksykon.com.pl

Materiały źródłowe

  • #1 Hallucinations: Etiology and clinical implications
    https://pmc.ncbi.nlm.nih.gov/articles/PMC2996210/
    The literature on hallucinations is reviewed, including history; theoretical background from physiological, biochemical and psychological points of view; classification; causation; presentation in different psychiatric and neurological disorders and in normal persons. […] Although the exact cause and pathogenesis of hallucinations are not known, evidence points toward multiple etiological factors for the hallucinatory phenomenon. […] In schizophrenia (SCZ), there is evidence that very high levels of dopamine in the limbic system play a major role in emergence of hallucinations and delusions. […] A deranged cholinergic neurotransmission has also been involved in the pathophysiology of hallucinations. […] Serotonin has also been implicated in the causation of hallucinations, based on the fact that a number of hallucinogenic drugs, like lysergic acid diethylamide (LSD), mescaline, psilocybin and ecstasy, appear to act, at least in part, as serotonin 5 HT2A receptor agonist or partial agonists.
  • #2 Hallucinations: Types, causes, and symptoms
    https://www.medicalnewstoday.com/articles/327014
    Hallucinations can be a sign of a mental health illness, but they do not always mean a person is unwell. Hallucinations are, in fact, relatively common. […] Scientists do not fully understand why some people have hallucinations, and others do not. Neither do they know what triggers hallucinations in people with conditions such as schizophrenia. […] Numerous medical conditions and other factors can cause hallucinations. A 2010 study attempted to review and discuss many of these hallucinations and their causes. They include: […] Drugs called hallucinogens can induce hallucinations. These drugs temporarily change the way the brain processes and sends information, causing unusual experiences and thoughts. […] Schizophrenia is a mental health condition that changes the way a person thinks and behaves. It can also cause psychosis, which is a loss of being in touch with reality.
  • #3 Auditory Hallucinations: Causes, Symptoms, Types & Treatment
    https://my.clevelandclinic.org/health/symptoms/23233-auditory-hallucinations
    Auditory hallucinations happen when you hear voices or noises that dont exist in reality. In some cases, theyre temporary and harmless, while in others, they may be a sign of a more serious mental health or neurological condition. Auditory hallucinations have many possible causes. […] Auditory hallucinations are often associated with schizophrenia and other mental health conditions, but they can happen for several other reasons, such as hearing loss, and arent always a sign of a mental health condition. […] Approximately 75% of people with schizophrenia experience auditory hallucinations usually hearing voices. […] People with other mental health conditions can experience auditory hallucinations. They affect: 20% to 50% of people with bipolar disorder. 40% of people with post-traumatic stress disorder (PTSD). 14% of people with an anxiety disorder. 10% of people with major depression.
  • #4 Auditory Hallucinations in Schizophrenia
    https://www.webmd.com/schizophrenia/auditory-hallucinations
    Auditory hallucinations are when you hear voices or other sounds that no one else hears. […] Up to 80% of people with schizophrenia say they have auditory hallucinations, with hearing voices being the most common. […] Schizophrenia is one of the most common causes of auditory hallucinations, but there are many other reasons you might hear things that arent there, including: […] Other mental illnesses. Hearing voices can sometimes happen with other mental illnesses as well, including: […] Alcohol. Heavy drinking can cause you to see things that arent there. […] Alzheimers disease and other types of dementia. […] Brain tumors. Hearing things doesnt mean you have a brain tumor. […] Drugs. Certain street drugs, such as ecstasy and LSD, can make you see and hear things that arent there.
  • #5 Hallucinations: Causes, Types, Diagnosis, Treatment
    https://www.webmd.com/schizophrenia/what-are-hallucinations
    Hallucinations are false perceptions, where you sense an object, person, or event even though it is not really there or didn’t happen. It seems very real to you. Sometimes, you may know you’re having a hallucination. Other times, you may be sure it’s real. […] There are many possible causes. Generally, they happen from chemical reactions in your body or changes in your brain. It could be a mental illness called schizophrenia, a nervous system problem such as Parkinson’s disease, epilepsy, or several other things. […] Hallucinations most often result from: […] Schizophrenia. More than 70% of people with this illness get visual hallucinations, and 60%-90% hear voices. But some may also smell and taste things that aren’t there. […] Many mental health conditions may involve hallucinations. It’s most common to hear voices. Schizophrenia is the main one.
  • #6 Auditory Hallucinations: Causes, Symptoms, Types & Treatment
    https://my.clevelandclinic.org/health/symptoms/23233-auditory-hallucinations
    Auditory hallucinations happen when you hear voices or noises that dont exist in reality. In some cases, theyre temporary and harmless, while in others, they may be a sign of a more serious mental health or neurological condition. Auditory hallucinations have many possible causes. […] Auditory hallucinations are often associated with schizophrenia and other mental health conditions, but they can happen for several other reasons, such as hearing loss, and arent always a sign of a mental health condition. […] Approximately 75% of people with schizophrenia experience auditory hallucinations usually hearing voices. […] People with other mental health conditions can experience auditory hallucinations. They affect: 20% to 50% of people with bipolar disorder. 40% of people with post-traumatic stress disorder (PTSD). 14% of people with an anxiety disorder. 10% of people with major depression.
  • #7 Auditory Hallucinations in Psychiatric Illness
    https://www.psychiatrictimes.com/view/auditory-hallucinations-psychiatric-illness
    Auditory hallucinations are false perceptions of sound. They have been described as the experience of internal words or noises that have no real origin in the outside world and are perceived to be separate from the persons mental processes. Auditory hallucinations feature prominently in many psychiatric disorders. It has been estimated that approximately 75% of people with schizophrenia experience auditory hallucinations. These hallucinations are also relatively common in bipolar disorder (20% to 50%), in major depression with psychotic features (10%), and in posttraumatic stress disorder (40%). Not all auditory hallucinations are associated with mental illness, and studies show that 10% to 40% of people without a psychiatric illness report hallucinatory experiences in the auditory modality. A range of organic brain disorders is also associated with hallucinations, including temporal lobe epilepsy; delirium; dementia; focal brain lesions; neuroinfections, such as viral encephalitis; and cerebral tumors. Intoxication or withdrawal from substances such as alcohol, cocaine, and amphetamines is also associated with auditory hallucinations. The phenomenological characteristics of auditory hallucinations differ on the basis of their etiology, and this can have diagnostic implications. People without mental illness tend to report a greater proportion of positive voices, a higher level of control over the voices, less frequent hallucinatory experiences, and less interference with activities than people who have a psychiatric illness. There is also evidence that delusion formation may distinguish psychotic disorders from nonclinical hallucinatory experiences. In other words, the development of delusions in people with auditory hallucinations significantly increases the risk of psychosis when compared with individuals who have hallucinations but not delusions. Because of the multiple causes of auditory hallucinations, physicians must take care to obtain detailed histories from the patient, to assess for mood and psychotic symptoms, and to obtain collateral information. The exact processes that underlie auditory hallucinations remain largely unknown. There are 2 principal avenues of research: one focuses on neuroanatomical networks using techniques such as positron emission tomography and functional MRI. The other focuses on cognitive and psychological processes and the exploration of mental events involved in auditory hallucinations. Auditory hallucinations are most likely to arise because of an interaction between perceptual, cognitive, and biological vulnerability as well as affective factors and contextual influences.
  • #8 Auditory Hallucinations: 4 Common Mental Health Causes
    https://lightfully.com/auditory-hallucinations-4-common-mental-health-disorders-that-can-trigger-them/
    Auditory hallucinations: 4 common mental health disorders that can trigger them. Hearing something that is not real can be startling and sometimes scary. […] These hallucinations can have many causes. To understand some potential causes of your auditory hallucinations, it can be helpful to learn about the mental health disorders that most often trigger them. […] Schizophrenia is a chronic mental health disorder. People with schizophrenia can have scattered thoughts and hallucinations. […] The hallucinations caused by schizophrenia can affect several senses including hearing. Hallucinations are a hallmark of this disorder. People with schizophrenia often report hearing voices that seem real to them. […] Bipolar disorder can be unpredictable. […] Auditory hallucinations are a common symptom of this disorder. During the highs, which are called manic episodes, someone might hear voices encouraging risky behavior.
  • #9 Auditory Hallucinations in Psychiatric Illness
    https://www.psychiatrictimes.com/view/auditory-hallucinations-psychiatric-illness
    Auditory hallucinations are false perceptions of sound. They have been described as the experience of internal words or noises that have no real origin in the outside world and are perceived to be separate from the persons mental processes. Auditory hallucinations feature prominently in many psychiatric disorders. It has been estimated that approximately 75% of people with schizophrenia experience auditory hallucinations. These hallucinations are also relatively common in bipolar disorder (20% to 50%), in major depression with psychotic features (10%), and in posttraumatic stress disorder (40%). Not all auditory hallucinations are associated with mental illness, and studies show that 10% to 40% of people without a psychiatric illness report hallucinatory experiences in the auditory modality. A range of organic brain disorders is also associated with hallucinations, including temporal lobe epilepsy; delirium; dementia; focal brain lesions; neuroinfections, such as viral encephalitis; and cerebral tumors. Intoxication or withdrawal from substances such as alcohol, cocaine, and amphetamines is also associated with auditory hallucinations. The phenomenological characteristics of auditory hallucinations differ on the basis of their etiology, and this can have diagnostic implications. People without mental illness tend to report a greater proportion of positive voices, a higher level of control over the voices, less frequent hallucinatory experiences, and less interference with activities than people who have a psychiatric illness. There is also evidence that delusion formation may distinguish psychotic disorders from nonclinical hallucinatory experiences. In other words, the development of delusions in people with auditory hallucinations significantly increases the risk of psychosis when compared with individuals who have hallucinations but not delusions. Because of the multiple causes of auditory hallucinations, physicians must take care to obtain detailed histories from the patient, to assess for mood and psychotic symptoms, and to obtain collateral information. The exact processes that underlie auditory hallucinations remain largely unknown. There are 2 principal avenues of research: one focuses on neuroanatomical networks using techniques such as positron emission tomography and functional MRI. The other focuses on cognitive and psychological processes and the exploration of mental events involved in auditory hallucinations. Auditory hallucinations are most likely to arise because of an interaction between perceptual, cognitive, and biological vulnerability as well as affective factors and contextual influences.
  • #10 Auditory Hallucinations in Schizophrenia – Psychiatry Advisor
    https://www.psychiatryadvisor.com/features/auditory-hallucinations-in-schizophrenia-dysfunction/
    Auditory hallucinations, or hearing voices, is one of the most prevalent symptoms of schizophrenia, reported by as many as 75% of patients. […] According to Dr McCarthy-Jones, there are many theories as to what causes people to hear voices: Some focus on events that happened to the person, whereas others focus on brain changes less clearly linked to life events. […] The cause of auditory hallucinations is often, but not always, rooted in traumatic early experience. […] Unlike auditory hallucinations in nonclinical populations, which are largely neutral or positive, those in schizophrenia tend to be negative and controlling, taking a huge toll on the emotional well-being and quality of life of the individual. […] Depression, significant stress, and increased suicidal attempts have all been linked to the severity of auditory hallucinations in people with schizophrenia.
  • #11 Auditory Hallucinations – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK557633/
    Auditory hallucinations are the sensory perceptions of hearing noises without an external stimulus. This symptom is particularly associated with schizophrenia and related psychotic disorders but is not specific to them. This activity provides an overview of the current understanding of auditory hallucinations in terms of etiology, pathophysiology, and treatment options, with further explanation of approaches to enhance the interprofessional team’s integrity in improving the outcome of individuals with this condition. […] Because auditory hallucinations manifest in a variety of disorders, the etiology is thought to be heterogeneous. Hallucinations most often precipitate in the setting of psychosis. Imaging studies using positron emission tomography and functional magnetic resonance imaging of patients with schizophrenia demonstrate increased activity in the striatal and thalamic subcortical nuclei, paralimbic regions, and hypothalamus. Further analysis reveals deficits in left temporal lobe functioning. Further consideration has been placed on aberrant glutamatergic transmission, which coincides with the hypo-functioning glutamate receptor hypothesis of psychosis.
  • #12 Auditory hallucination – Wikipedia
    https://en.wikipedia.org/wiki/Auditory_hallucination
    An auditory hallucination, or paracusia, is a form of hallucination that involves perceiving sounds without auditory stimulus. While experiencing an auditory hallucination, the affected person hears a sound or sounds that did not come from the natural environment. […] A common form of auditory hallucination involves hearing one or more voices without a speaker present, known as an auditory verbal hallucination. This may be associated with psychotic disorders, most notably schizophrenia, and this phenomenon is often used to diagnose these conditions. […] However, individuals without any psychiatric disease whatsoever may hear voices, including those under the influence of mind-altering substances, such as cannabis, cocaine, amphetamines, and PCP. […] In the past, the cause of auditory hallucinations was attributed to cognitive suppression by way of executive function failure of the frontoparietal sulcus. Newer research has found that they coincide with the left superior temporal gyrus, suggesting that they are better attributed to speech misrepresentations.
  • #13 Auditory hallucination – Wikipedia
    https://en.wikipedia.org/wiki/Auditory_hallucination
    It is assumed through research that the neural pathways involved in normal speech perception and production, which are lateralized to the left temporal lobe, also underlie auditory hallucinations. […] Auditory hallucinations correspond with spontaneous neural activity of the left temporal lobe, and the subsequent primary auditory cortex. The perception of auditory hallucinations corresponds to the experience of actual external hearing, despite the absence of any sound itself. […] In people with psychosis, the premier cause of auditory hallucinations is schizophrenia, and these are known as auditory verbal hallucinations (AVHs). […] The causal basis of hallucinations has been explored on the cellular receptor level. The glutamate hypothesis, proposed as a possible cause for schizophrenia, may also have implications in auditory hallucinations, which are suspected to be triggered by altered glutamatergic transmission.
  • #14 Auditory Hallucinations – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK557633/
    The precise mechanism by which paracusias occur remains elusive. However, several postulations have been suggested. Functional magnetic resonance imaging findings have demonstrated the spontaneous activation of the auditory network, consisting of the left superior temporal gyrus, transverse temporal gyri (Heschl gyri), and the left temporal lobe. A neurocognitive model called the VOICE model has been offered, which attributes the paracusias to an unbalanced bottom-up limbic hyperexcitation mismatched against a hypoactive prefrontal inhibitory system. This mismatch results in the spontaneous firing of sensory neurons without appropriate inhibitory mechanisms. Some data suggest that the thalamus-amygdala pathways are activated, thereby processing an emotional response to the auditory hallucinations, which is further proved by another study detecting choline and N-acetyl aspirate ratio abnormalities in the thalamus. At a neurochemical level, dopamine (D2) and serotonin (5HT2a) receptors are particularly important. Neuroimaging studies have demonstrated increased D2 receptor occupancy in the striatal system and 5HT2a receptor occupancy in the caudate nucleus.
  • #15 Hearing Voices in Schizophrenia I Psych Central
    https://psychcentral.com/schizophrenia/schizophrenia-voices
    Hearing voices is a form of auditory hallucination common in some psychiatric disorders, such as schizophrenia. […] However, when you experience auditory hallucinations in the absence of external factors, more than a trick of sound waves may be to blame. […] Hallucinations are a primary symptom of psychosis a condition that occurs when your brain experiences a break from reality. They can also be a symptom of mental health conditions such as schizophrenia and dementia. […] The exact cause of auditory hallucinations is still being explored. […] Changes in the brain may influence your chances of experiencing an auditory hallucination. […] In a 2017 review, experts suggested that differences in the left temporal lobe of the brain could impair the perception of and attention to external sounds.
  • #16 Hearing Voices in Schizophrenia I Psych Central
    https://psychcentral.com/schizophrenia/schizophrenia-voices
    It was also noted that excitatory neurotransmitters and amygdala functioning might skew the emotional undertones of voices being heard. […] Researchers are still unclear why auditory hallucinations shift over time, happen spontaneously, or eventually stop completely. […] Theres also no indication of why hearing voices is predominantly seen in some mental health conditions such as schizophrenia, as opposed to other neurological conditions such as Parkinsons disease or epilepsy. […] In a 2021 study, researchers noted a number of factors in schizophrenia that could be involved beyond those affecting the auditory and language areas of the brain. […] These factors include genetics, changes in your levels of glutamate, a neurotransmitter that sends messages in the brain and nerves, electroencephalographic alterations in the brain, changes in the white matter of the brain, and cortical structure. […] If you live with schizophrenia, auditory hallucinations such as hearing voices are not uncommon. With treatment and support, you can learn to manage and reduce the severity of your symptoms.
  • #17 Auditory Hallucinations – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK557633/
    The precise mechanism by which paracusias occur remains elusive. However, several postulations have been suggested. Functional magnetic resonance imaging findings have demonstrated the spontaneous activation of the auditory network, consisting of the left superior temporal gyrus, transverse temporal gyri (Heschl gyri), and the left temporal lobe. A neurocognitive model called the VOICE model has been offered, which attributes the paracusias to an unbalanced bottom-up limbic hyperexcitation mismatched against a hypoactive prefrontal inhibitory system. This mismatch results in the spontaneous firing of sensory neurons without appropriate inhibitory mechanisms. Some data suggest that the thalamus-amygdala pathways are activated, thereby processing an emotional response to the auditory hallucinations, which is further proved by another study detecting choline and N-acetyl aspirate ratio abnormalities in the thalamus. At a neurochemical level, dopamine (D2) and serotonin (5HT2a) receptors are particularly important. Neuroimaging studies have demonstrated increased D2 receptor occupancy in the striatal system and 5HT2a receptor occupancy in the caudate nucleus.
  • #18 Hallucinations: Etiology and clinical implications
    https://pmc.ncbi.nlm.nih.gov/articles/PMC2996210/
    The literature on hallucinations is reviewed, including history; theoretical background from physiological, biochemical and psychological points of view; classification; causation; presentation in different psychiatric and neurological disorders and in normal persons. […] Although the exact cause and pathogenesis of hallucinations are not known, evidence points toward multiple etiological factors for the hallucinatory phenomenon. […] In schizophrenia (SCZ), there is evidence that very high levels of dopamine in the limbic system play a major role in emergence of hallucinations and delusions. […] A deranged cholinergic neurotransmission has also been involved in the pathophysiology of hallucinations. […] Serotonin has also been implicated in the causation of hallucinations, based on the fact that a number of hallucinogenic drugs, like lysergic acid diethylamide (LSD), mescaline, psilocybin and ecstasy, appear to act, at least in part, as serotonin 5 HT2A receptor agonist or partial agonists.
  • #19 Hallucinations: Etiology and clinical implications
    https://pmc.ncbi.nlm.nih.gov/articles/PMC2996210/
    The literature on hallucinations is reviewed, including history; theoretical background from physiological, biochemical and psychological points of view; classification; causation; presentation in different psychiatric and neurological disorders and in normal persons. […] Although the exact cause and pathogenesis of hallucinations are not known, evidence points toward multiple etiological factors for the hallucinatory phenomenon. […] In schizophrenia (SCZ), there is evidence that very high levels of dopamine in the limbic system play a major role in emergence of hallucinations and delusions. […] A deranged cholinergic neurotransmission has also been involved in the pathophysiology of hallucinations. […] Serotonin has also been implicated in the causation of hallucinations, based on the fact that a number of hallucinogenic drugs, like lysergic acid diethylamide (LSD), mescaline, psilocybin and ecstasy, appear to act, at least in part, as serotonin 5 HT2A receptor agonist or partial agonists.
  • #20 Hallucinations: Etiology and clinical implications
    https://pmc.ncbi.nlm.nih.gov/articles/PMC2996210/
    A possible role of glutamate in hallucinations is suggested by the finding that glutamate antagonists like phencyclidine and ketamine can induce hallucinations. […] Hallucinations cause sensory modality-specific activation in cerebral areas involved in normal sensation. […] Hallucinations can be seen as erroneous perception or sensory deception. […] Most recent models of hallucinations assume that hallucinations are related to misattribution of private events. […] Some studies provide evidence for Bentalls notion that hallucinators are impaired in their ability to discriminate between real and imagined events and reveal a specific bias towards attributing their thoughts to an external source. […] Morrison is in agreement with the theory that hallucinations are internal cognitive events that are misattributed to an external source. […] Hallucination is a fundamental symptom in psychiatry. […] Conventionally, hallucinations are treated as psychotic features. However, there is ample evidence to support the fact that hallucination could be present in nonpsychotic conditions.
  • #21 Auditory hallucination – Wikipedia
    https://en.wikipedia.org/wiki/Auditory_hallucination
    It is assumed through research that the neural pathways involved in normal speech perception and production, which are lateralized to the left temporal lobe, also underlie auditory hallucinations. […] Auditory hallucinations correspond with spontaneous neural activity of the left temporal lobe, and the subsequent primary auditory cortex. The perception of auditory hallucinations corresponds to the experience of actual external hearing, despite the absence of any sound itself. […] In people with psychosis, the premier cause of auditory hallucinations is schizophrenia, and these are known as auditory verbal hallucinations (AVHs). […] The causal basis of hallucinations has been explored on the cellular receptor level. The glutamate hypothesis, proposed as a possible cause for schizophrenia, may also have implications in auditory hallucinations, which are suspected to be triggered by altered glutamatergic transmission.
  • #22 Hallucinations: Etiology and clinical implications
    https://pmc.ncbi.nlm.nih.gov/articles/PMC2996210/
    A possible role of glutamate in hallucinations is suggested by the finding that glutamate antagonists like phencyclidine and ketamine can induce hallucinations. […] Hallucinations cause sensory modality-specific activation in cerebral areas involved in normal sensation. […] Hallucinations can be seen as erroneous perception or sensory deception. […] Most recent models of hallucinations assume that hallucinations are related to misattribution of private events. […] Some studies provide evidence for Bentalls notion that hallucinators are impaired in their ability to discriminate between real and imagined events and reveal a specific bias towards attributing their thoughts to an external source. […] Morrison is in agreement with the theory that hallucinations are internal cognitive events that are misattributed to an external source. […] Hallucination is a fundamental symptom in psychiatry. […] Conventionally, hallucinations are treated as psychotic features. However, there is ample evidence to support the fact that hallucination could be present in nonpsychotic conditions.
  • #23 Hallucinations: Etiology and clinical implications
    https://pmc.ncbi.nlm.nih.gov/articles/PMC2996210/
    A possible role of glutamate in hallucinations is suggested by the finding that glutamate antagonists like phencyclidine and ketamine can induce hallucinations. […] Hallucinations cause sensory modality-specific activation in cerebral areas involved in normal sensation. […] Hallucinations can be seen as erroneous perception or sensory deception. […] Most recent models of hallucinations assume that hallucinations are related to misattribution of private events. […] Some studies provide evidence for Bentalls notion that hallucinators are impaired in their ability to discriminate between real and imagined events and reveal a specific bias towards attributing their thoughts to an external source. […] Morrison is in agreement with the theory that hallucinations are internal cognitive events that are misattributed to an external source. […] Hallucination is a fundamental symptom in psychiatry. […] Conventionally, hallucinations are treated as psychotic features. However, there is ample evidence to support the fact that hallucination could be present in nonpsychotic conditions.
  • #24 Hallucinations: Etiology and clinical implications
    https://pmc.ncbi.nlm.nih.gov/articles/PMC2996210/
    A possible role of glutamate in hallucinations is suggested by the finding that glutamate antagonists like phencyclidine and ketamine can induce hallucinations. […] Hallucinations cause sensory modality-specific activation in cerebral areas involved in normal sensation. […] Hallucinations can be seen as erroneous perception or sensory deception. […] Most recent models of hallucinations assume that hallucinations are related to misattribution of private events. […] Some studies provide evidence for Bentalls notion that hallucinators are impaired in their ability to discriminate between real and imagined events and reveal a specific bias towards attributing their thoughts to an external source. […] Morrison is in agreement with the theory that hallucinations are internal cognitive events that are misattributed to an external source. […] Hallucination is a fundamental symptom in psychiatry. […] Conventionally, hallucinations are treated as psychotic features. However, there is ample evidence to support the fact that hallucination could be present in nonpsychotic conditions.
  • #25 Auditory hallucination – Wikipedia
    https://en.wikipedia.org/wiki/Auditory_hallucination
    The causes of auditory hallucinations are unclear. […] It is suspected that deficits in the left temporal lobe attribute that lead to spontaneous neural activity cause speech misrepresentations that account for auditory hallucinations. […] Charles Fernyhough, of the University of Durham, poses one theory among many but stands as a reasonable example of the literature. Given standing evidence towards the involvement of the inner voice in auditory hallucinations, he proposes two alternative hypotheses on the origins of auditory hallucinations in the non-psychotic. […] The internalization process of the inner voice is the process of creating an inner voice during early childhood and can be separated into four distinct levels. […] A disruption could occur during the normal process of internalizing one’s inner voice, where the individual would not interpret their own voice as belonging to them; a problem that would be interpreted as a level one to level four error. […] Alternatively, the disruption could occur during the process of re-externalizing one’s inner voice, resulting in an apparent second voice that seems alien to the individual; a problem that would be interpreted as a level four to level one error.
  • #26 Auditory hallucination – Wikipedia
    https://en.wikipedia.org/wiki/Auditory_hallucination
    The causes of auditory hallucinations are unclear. […] It is suspected that deficits in the left temporal lobe attribute that lead to spontaneous neural activity cause speech misrepresentations that account for auditory hallucinations. […] Charles Fernyhough, of the University of Durham, poses one theory among many but stands as a reasonable example of the literature. Given standing evidence towards the involvement of the inner voice in auditory hallucinations, he proposes two alternative hypotheses on the origins of auditory hallucinations in the non-psychotic. […] The internalization process of the inner voice is the process of creating an inner voice during early childhood and can be separated into four distinct levels. […] A disruption could occur during the normal process of internalizing one’s inner voice, where the individual would not interpret their own voice as belonging to them; a problem that would be interpreted as a level one to level four error. […] Alternatively, the disruption could occur during the process of re-externalizing one’s inner voice, resulting in an apparent second voice that seems alien to the individual; a problem that would be interpreted as a level four to level one error.
  • #27 Auditory Hallucinations: Causes, Symptoms, Types & Treatment
    https://my.clevelandclinic.org/health/symptoms/23233-auditory-hallucinations
    Auditory hallucinations occur in 16% of adults with hearing impairment, which can take two forms: simple hallucinations (tinnitus) and complex hallucinations (speech and music). […] Several neurological conditions can cause auditory hallucinations, including: Sleep disorders, such as narcolepsy and insomnia. Parkinsons disease. Stroke. Migraine. Brain tumors or lesions in your temporal lobe, brainstem or thalamus. […] Several other usually temporary conditions and situations can cause auditory hallucinations, including: Alcohol and recreational drug use. Lack of sleep. Extreme hunger. Certain prescribed medications (as a side effect). Extreme stress or grief. Infections, such as UTIs, especially in people who are older. Recovering from anesthesia after a surgery or procedure. […] The treatment for auditory hallucinations depends on the cause. Hallucinations caused by temporary conditions, such as extreme hunger or lack of sleep, will stop once the underlying condition has been treated or resolved.
  • #28 Auditory Hallucinations in Schizophrenia
    https://www.webmd.com/schizophrenia/auditory-hallucinations
    Auditory hallucinations are when you hear voices or other sounds that no one else hears. […] Up to 80% of people with schizophrenia say they have auditory hallucinations, with hearing voices being the most common. […] Schizophrenia is one of the most common causes of auditory hallucinations, but there are many other reasons you might hear things that arent there, including: […] Other mental illnesses. Hearing voices can sometimes happen with other mental illnesses as well, including: […] Alcohol. Heavy drinking can cause you to see things that arent there. […] Alzheimers disease and other types of dementia. […] Brain tumors. Hearing things doesnt mean you have a brain tumor. […] Drugs. Certain street drugs, such as ecstasy and LSD, can make you see and hear things that arent there.
  • #29 Hallucinations/Delusions | Parkinson’s Foundation
    https://www.parkinson.org/understanding-parkinsons/non-movement-symptoms/hallucinations-delusions
    Psychosis can vary from severe confusion (disordered thinking) to seeing things that arent there (hallucinations) to believing things that are not true (delusions). […] Between 20-40% of people with Parkinsons report the experience of hallucinations or delusions. […] Hallucinations are when someone sees, hears or feels something that is not actually there. […] Hearing voices or sounds that are not real is less common but is reported by a small percentage of people with PD. […] Hallucinations are most often a side effect of medication and are not necessarily a sign of a decline in cognitive abilities. […] Medication, dementia and delirium are the three main contributors to the development of psychosis in Parkinsons disease. […] Many PD medications can lead to symptoms of psychosis: Classic PD medications like carbidopa-levodopa (Sinemet) and dopamine agonists are designed to increase dopamine levels, improving motor symptoms.
  • #30 Hallucinations and dementia | Alzheimer’s Society
    https://www.alzheimers.org.uk/about-dementia/symptoms-and-diagnosis/hallucinations
    Dementia may cause a person to have hallucinations or see things that aren’t there. This is most common in people living with dementia with Lewy bodies, although other types of dementia may also cause hallucinations. […] Visual hallucinations are usually caused by damage to the brain. They are more common in people with dementia with Lewy bodies and Parkinsons disease dementia. People with Alzheimers disease can also have hallucinations. […] Hallucinations can also be caused by physical illness including fever, seizure, stroke, migraine and infection. […] Some people with worsening vision start to see things that arent there (visual hallucinations) because of their deteriorating sight and not from any other condition, such as dementia or a mental health problem. […] Some people with dementia will have hallucinations in different senses for example: auditory hallucinations hearing things that arent there, like voices or footsteps.
  • #31 Auditory hallucinations: Causes, types, and more
    https://www.medicalnewstoday.com/articles/auditory-hallucinations
    Auditory hallucinations involve hearing sounds that have no source or observable cause. It is common in several conditions. […] While this symptom occurs fairly often in people with schizophrenia, it can also occur in a range of other psychiatric conditions, such as depression. It may also stem from nonpsychiatric conditions, such as seizures. […] Evidence indicates that auditory hallucinations may happen in the following conditions: […] Auditory hallucinations have strong links to schizophrenia and related psychotic conditions, and 75% of people with these conditions experience them. The particular kind of auditory hallucinations they have is mostly verbal, meaning they involve voices. […] Psychiatric conditions other than schizophrenia that cause auditory hallucinations include: […] Neurological conditions that may be responsible for auditory hallucinations include:
  • #32 Hearing Voices at Night? Causes of Auditory Hallucinations
    https://www.verywellhealth.com/hearing-voices-at-night-5198767
    Hearing voices or sounds that aren’t there, also referred to as auditory hallucinations, can be scary and confusing, especially at night. While it is a symptom of certain mental health conditions, other more common reasons that might be causing someone to hear voices are medical conditions such as narcolepsy, infections, lack of sleep, recent bereavement, and fever. […] Auditory hallucinations involve hearing noises that have no physical source. This may involve hearing a voice speak to you and could be positive, negative, or neutral. […] There are many reasons that you might hear voices. Remember, while it is a symptom of some mental health conditions, including schizophrenia, there are more common causes of auditory hallucinations. […] Common reasons for hearing voices at night include: Lack of sleep: Problems with sleep can cause you to hear voices or have other sensory experiences. Hunger: Being very hungry or not having eaten much recently may cause auditory hallucinations. Physical illness: Having a high temperature and being delirious may cause hallucinations. Bereavement: It is not uncommon for those who have recently lost someone very close to hear them talking or feel them close by.
  • #33 Auditory Hallucinations: Causes, Symptoms, Types & Treatment
    https://my.clevelandclinic.org/health/symptoms/23233-auditory-hallucinations
    Auditory hallucinations occur in 16% of adults with hearing impairment, which can take two forms: simple hallucinations (tinnitus) and complex hallucinations (speech and music). […] Several neurological conditions can cause auditory hallucinations, including: Sleep disorders, such as narcolepsy and insomnia. Parkinsons disease. Stroke. Migraine. Brain tumors or lesions in your temporal lobe, brainstem or thalamus. […] Several other usually temporary conditions and situations can cause auditory hallucinations, including: Alcohol and recreational drug use. Lack of sleep. Extreme hunger. Certain prescribed medications (as a side effect). Extreme stress or grief. Infections, such as UTIs, especially in people who are older. Recovering from anesthesia after a surgery or procedure. […] The treatment for auditory hallucinations depends on the cause. Hallucinations caused by temporary conditions, such as extreme hunger or lack of sleep, will stop once the underlying condition has been treated or resolved.
  • #34 Why are auditory hallucinations called 'Hearing Voices’?
    https://www.amplifon.com/uk/audiology-magazine/auditory-hallucinations
    Hearing loss. People with hearing loss in one or both ears can hear anything from sounds, music and voices that aren’t real. […] Alcohol. Heavy drinking can make you see things that are not there, as well as hear nonexistent noise, which can become a constant after drinking for many years. […] Drugs. Some drugs, such as ecstasy and LSD, can make you see and hear things that are not there. […] Epilepsy. When seizures affect the area of the brain that processes hearing, you may hear buzzing or voices. In some cases, it distorts the way you can perceive sounds. […] High fever and infections. Some infections, such as encephalitis and meningitis, can cause you to have auditory hallucinations, along with other symptoms. The same goes for high fevers. […] Intense stress. Severe stress, particularly following a traumatic injury, can cause auditory hallucinations. It is also especially common to hear the voice of a loved one after his or her recent death.
  • #35 Auditory Hallucinations: Causes, Symptoms, Types & Treatment
    https://my.clevelandclinic.org/health/symptoms/23233-auditory-hallucinations
    Auditory hallucinations occur in 16% of adults with hearing impairment, which can take two forms: simple hallucinations (tinnitus) and complex hallucinations (speech and music). […] Several neurological conditions can cause auditory hallucinations, including: Sleep disorders, such as narcolepsy and insomnia. Parkinsons disease. Stroke. Migraine. Brain tumors or lesions in your temporal lobe, brainstem or thalamus. […] Several other usually temporary conditions and situations can cause auditory hallucinations, including: Alcohol and recreational drug use. Lack of sleep. Extreme hunger. Certain prescribed medications (as a side effect). Extreme stress or grief. Infections, such as UTIs, especially in people who are older. Recovering from anesthesia after a surgery or procedure. […] The treatment for auditory hallucinations depends on the cause. Hallucinations caused by temporary conditions, such as extreme hunger or lack of sleep, will stop once the underlying condition has been treated or resolved.
  • #36 Hallucinations: Types, causes, and symptoms
    https://www.medicalnewstoday.com/articles/327014
    People with anxiety and depression may experience periodic hallucinations. The hallucinations are typically very brief and often relate to the specific emotions the person is feeling. […] Withdrawal from alcohol can cause hallucinations, especially in people who experience a severe withdrawal syndrome called delirium tremens. […] Dementia progressively damages the brain, including regions involved with sensory processing. People in mid to late stage dementia may experience auditory and visual hallucinations. […] Sometimes hallucinations are a symptom of a seizure disorder. A person may experience hallucinations during or after a seizure. […] Some people with migraines experience hallucinations during or right before a migraine. […] Some people experience hallucinations that doctors associate with sleep disorders.
  • #37 Hallucinations: MedlinePlus Medical EncyclopediaLock
    https://medlineplus.gov/ency/article/003258.htm
    Hallucinations involve sensing things such as visions, sounds, or smells that seem real but are not. These things are created by the mind. […] Hearing voices when no one has spoken (the most common type of hallucination). These voices may be positive, negative, or neutral. They may command someone to do something that may cause harm to themselves or others. […] There are many causes of hallucinations, including: Being drunk or high, or coming down from such drugs like marijuana, LSD, cocaine (including crack), PCP, amphetamines, heroin, ketamine, and alcohol. […] Mental disorders, such as schizophrenia and psychotic depression. […] A person who begins to hallucinate and is detached from reality should get checked by their health care provider right away. Many medical and mental conditions that can cause hallucinations may quickly become emergencies. […] A person who smells odors that are not there should also be evaluated by their provider. These hallucinations may be caused by medical conditions such as epilepsy and Parkinson disease. […] Treatment depends on the cause of your hallucinations.
  • #38 Hallucination – Wikipedia
    https://en.wikipedia.org/wiki/Hallucination
    High caffeine consumption has been linked to an increase in likelihood of one experiencing auditory hallucinations. […] Hallucinations can be caused by a number of factors. […] These hallucinations occur just before falling asleep and affect a high proportion of the population: in one survey 37% of the respondents experienced them twice a week. […] The subject is usually fully conscious and then can interact with the hallucinatory characters for extended periods of time. […] One of the more enigmatic forms of visual hallucination is the highly variable, possibly polymodal delirium tremens. […] Presence hallucinations can be an early indicator of cognitive decline in Parkinson’s Disease. […] Charles Bonnet syndrome is the name given to visual hallucinations experienced by a partially or severely sight impaired person.
  • #39 Hearing Voices at Night? Causes of Auditory Hallucinations
    https://www.verywellhealth.com/hearing-voices-at-night-5198767
    Hearing voices or sounds that aren’t there, also referred to as auditory hallucinations, can be scary and confusing, especially at night. While it is a symptom of certain mental health conditions, other more common reasons that might be causing someone to hear voices are medical conditions such as narcolepsy, infections, lack of sleep, recent bereavement, and fever. […] Auditory hallucinations involve hearing noises that have no physical source. This may involve hearing a voice speak to you and could be positive, negative, or neutral. […] There are many reasons that you might hear voices. Remember, while it is a symptom of some mental health conditions, including schizophrenia, there are more common causes of auditory hallucinations. […] Common reasons for hearing voices at night include: Lack of sleep: Problems with sleep can cause you to hear voices or have other sensory experiences. Hunger: Being very hungry or not having eaten much recently may cause auditory hallucinations. Physical illness: Having a high temperature and being delirious may cause hallucinations. Bereavement: It is not uncommon for those who have recently lost someone very close to hear them talking or feel them close by.
  • #40 Hallucinations: Types, causes, and symptoms
    https://www.medicalnewstoday.com/articles/327014
    People with anxiety and depression may experience periodic hallucinations. The hallucinations are typically very brief and often relate to the specific emotions the person is feeling. […] Withdrawal from alcohol can cause hallucinations, especially in people who experience a severe withdrawal syndrome called delirium tremens. […] Dementia progressively damages the brain, including regions involved with sensory processing. People in mid to late stage dementia may experience auditory and visual hallucinations. […] Sometimes hallucinations are a symptom of a seizure disorder. A person may experience hallucinations during or after a seizure. […] Some people with migraines experience hallucinations during or right before a migraine. […] Some people experience hallucinations that doctors associate with sleep disorders.
  • #41 Hallucinations and hearing voices
    https://www.healthywa.wa.gov.au/Articles/F_I/Hallucinations-and-hearing-voices
    Hallucinations refer to the experience of hearing, seeing or smelling things that are not there. […] Intense negative emotions such as stress or grief can make people particularly vulnerable to hallucinations, as can conditions such as hearing or vision loss, and drugs or alcohol. […] Hallucinations occur frequently in psychiatric conditions such as schizophrenia, bipolar disorder, post-traumatic disorder and borderline personality disorder, as well as in other disorders such as dementia and Parkinsons. […] People who experience hallucinations do not necessarily suffer from a mental illness. […] There are different treatment options depending on the cause of hallucinations.
  • #42 What Does “Hearing Voices” Mean?
    https://www.rethink.org/advice-and-information/about-mental-illness/mental-health-symptoms/hearing-voices/
    Other life experiences can make you hear voices or make your voices worse. These include trauma, including physical and sexual abuse, stress, anger or anxiety, drugs and alcohol, homelessness, delirium, grief after bereavement, divorce or separation, and tiredness. […] Research does suggest that mental illness can run in families. But it isn’t yet possible to separate genetics and life experiences to work out the cause of mental health problems. Research suggests that changes to your brain chemistry can cause you to hear voices.
  • #43 What Are Hallucinations and What Causes Them?
    https://www.healthline.com/health/hallucinations
    Certain medications taken for mental and physical health conditions can also cause hallucinations. Parkinsons disease, depression, psychosis, and epilepsy medications may sometimes trigger hallucination symptoms. […] Other conditions can also cause hallucinations. These can include high fevers, especially in children and the elderly, migraine, social isolation, particularly in older adults, seizures, deafness, blindness, or vision problems, epilepsy (in some cases, epileptic seizures can cause you to see flashing shapes or bright spots), terminal illnesses, such as stage 3 HIV (AIDS), brain cancer, or kidney and liver failure.
  • #44 Azthena logo with the word Azthena
    https://www.news-medical.net/health/What-Causes-Hearing-Voices.aspx
    The phenomenon of hearing voices inside the head, which others cannot, can be categorized as a common form of auditory hallucination. Hallucination is the perception or sensation of voices that can be heard by a person when they are awake and gives the feeling of being real. […] There are many significant factors that can cause hearing voices. The major factors that contribute to this condition are stress, anxiety, depression, and traumatic experiences. In some cases, there might be environmental and genetic factors that cause such hearing of voices. […] There are several possible causes that that may cause people to hear voices, including: Traumatic incidents – Hearing of voices might be the result of a traumatic incident that occurred in the early life of the patient, while hearing one or more voices might be a result of his experiencing a disassociate disorder.
  • #45 Medications That May Cause Hallucinations as a Side Effect – BuzzRx
    https://www.buzzrx.com/blog/medications-that-may-cause-hallucinations-as-a-side-effect
    Seeing a shimmering light around a person or an object, feeling bugs crawling on your skin, or hearing voices in your head are all different types of hallucinations. […] Hallucinations are also common symptoms in psychiatric disorders like schizophrenia and bipolar disorder. […] Hearing voices in the head is some of the most common types of hallucinations in people with schizophrenia, bipolar disorder, dementia, and other types of mental illness. […] Yes, both prescription medications and over-the-counter drugs can potentially make you hallucinate. […] Psychiatric medications such as haloperidol (Haldol), quetiapine (Seroquel), and olanzapine (Zyprexa) can cause hallucinations. […] Hallucinations caused by psychiatric drugs tend to be more detailed, vivid, and real because they affect the central nervous system directly.
  • #46 Medications That May Cause Hallucinations as a Side Effect – BuzzRx
    https://www.buzzrx.com/blog/medications-that-may-cause-hallucinations-as-a-side-effect
    People taking sedative-hypnotic drugs like zolpidem (Ambien) and eszopiclone (Lunesta), which are used to treat insomnia, can experience hallucinations as a side effect. […] Hallucinations can occur during withdrawal from benzodiazepines caused by abrupt discontinuation after taking them at high doses or for a prolonged period. […] Medications like ropinirole (Requip) which are used to treat medical conditions like Parkinson’s disease, can cause hallucinations, especially in older patients. […] There have been rare reports of vivid dreams and auditory and visual hallucinations related to cephalosporins and sulfa drugs. […] Some medications used to treat heart disease, such as beta-adrenergic blocking agents, ACE inhibitors, and antianginal drugs, can cause hallucinations in a small number of people.
  • #47 Hallucinations and hearing voices – NHS
    https://www.nhs.uk/mental-health/feelings-symptoms-behaviours/feelings-and-symptoms/hallucinations-hearing-voices/
    Hallucinations can be caused by many different health conditions that affect the senses. […] Common causes of hallucinations include: mental health conditions like schizophrenia or a bipolar disorder, drugs and alcohol, Alzheimer’s disease or Parkinson’s disease, a change or loss of vision, such as Charles Bonnet syndrome, anxiety, depression or bereavement, side effect from medicines, after surgery and anaesthesia. […] Sometimes hallucinations can be temporary. They can happen if you have migraines, a high temperature or just as you wake up or fall asleep. […] They can also be caused by an infection, brain tumour or confusion (delirium), especially in older people. […] Treatment for hallucinations will depend on what’s causing it. […] For example, if you have a mental health condition like schizophrenia, you may be given therapy or medicine to help reduce your hallucinations.
  • #48 Hear Voices in Your Head? When to Be Concerned
    https://www.healthline.com/health/mental-health/i-hear-voices-in-my-head
    Its possible to have auditory hallucinations with many different mental health conditions, though not everyone with these conditions will ever hear voices. […] You could hear voices with health conditions that affect the brain or nervous system, including: meningitis, Parkinsons disease, dementia, temporal lobe epilepsy, migraine, a brain tumor. […] You could experience hallucinations when you dont get enough of certain vitamins, including vitamins D and B12. […] Hearing voices that say cruel or unkind things, however, can affect your sense of self-worth and emotional well-being. […] When voices do occur alongside other symptoms, cause distress, or happen frequently enough to affect your daily life, you can talk with a healthcare professional to discuss diagnosis and treatment options.
  • #49 Hallucinations: Etiology and clinical implications
    https://pmc.ncbi.nlm.nih.gov/articles/PMC2996210/
    A possible role of glutamate in hallucinations is suggested by the finding that glutamate antagonists like phencyclidine and ketamine can induce hallucinations. […] Hallucinations cause sensory modality-specific activation in cerebral areas involved in normal sensation. […] Hallucinations can be seen as erroneous perception or sensory deception. […] Most recent models of hallucinations assume that hallucinations are related to misattribution of private events. […] Some studies provide evidence for Bentalls notion that hallucinators are impaired in their ability to discriminate between real and imagined events and reveal a specific bias towards attributing their thoughts to an external source. […] Morrison is in agreement with the theory that hallucinations are internal cognitive events that are misattributed to an external source. […] Hallucination is a fundamental symptom in psychiatry. […] Conventionally, hallucinations are treated as psychotic features. However, there is ample evidence to support the fact that hallucination could be present in nonpsychotic conditions.
  • #50 Auditory hallucinations activate language and verbal short-term memory, but not auditory, brain regions | Scientific Reports
    https://www.nature.com/articles/s41598-021-98269-1
    Auditory verbal hallucinations (AVH, hearing voices) are an important symptom of schizophrenia but their biological basis is not well understood. One longstanding approach proposes that they are perceptual in nature, specifically that they reflect spontaneous abnormal neuronal activity in the auditory cortex, perhaps with additional top down cognitive influences. […] Here, using a novel variant of the symptom capture technique, we show that the experience of AVH does not induce auditory cortex activation, even while real speech does, something that effectively rules out all theories that propose a perceptual component to AVH. Instead, we find that the experience of AVH activates language regions and/or regions that are engaged during verbal short-term memory. […] Theoretical approaches to AVH include so-called cognitive models, which argue that they are a manifestation of non-perceptual processes, for example inner speech that fails to be labeled as internally generated, or memories whose vividness and/or intrusiveness leads them to be misinterpreted as perceptions.
  • #51 Auditory hallucination – Wikipedia
    https://en.wikipedia.org/wiki/Auditory_hallucination
    It is assumed through research that the neural pathways involved in normal speech perception and production, which are lateralized to the left temporal lobe, also underlie auditory hallucinations. […] Auditory hallucinations correspond with spontaneous neural activity of the left temporal lobe, and the subsequent primary auditory cortex. The perception of auditory hallucinations corresponds to the experience of actual external hearing, despite the absence of any sound itself. […] In people with psychosis, the premier cause of auditory hallucinations is schizophrenia, and these are known as auditory verbal hallucinations (AVHs). […] The causal basis of hallucinations has been explored on the cellular receptor level. The glutamate hypothesis, proposed as a possible cause for schizophrenia, may also have implications in auditory hallucinations, which are suspected to be triggered by altered glutamatergic transmission.
  • #52 Auditory hallucination – Wikipedia
    https://en.wikipedia.org/wiki/Auditory_hallucination
    It is assumed through research that the neural pathways involved in normal speech perception and production, which are lateralized to the left temporal lobe, also underlie auditory hallucinations. […] Auditory hallucinations correspond with spontaneous neural activity of the left temporal lobe, and the subsequent primary auditory cortex. The perception of auditory hallucinations corresponds to the experience of actual external hearing, despite the absence of any sound itself. […] In people with psychosis, the premier cause of auditory hallucinations is schizophrenia, and these are known as auditory verbal hallucinations (AVHs). […] The causal basis of hallucinations has been explored on the cellular receptor level. The glutamate hypothesis, proposed as a possible cause for schizophrenia, may also have implications in auditory hallucinations, which are suspected to be triggered by altered glutamatergic transmission.
  • #53 Impaired motor-to-sensory transformation mediates auditory hallucinations | PLOS Biology
    https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3002836
    Impaired motor-to-sensory transformation mediates auditory hallucinations. Distinguishing reality from hallucinations requires efficient monitoring of agency. It has been hypothesized that a copy of motor signals, termed efference copy (EC) or corollary discharge (CD), suppresses sensory responses to yield a sense of agency; impairment of the inhibitory function leads to hallucinations. However, how can the sole absence of inhibition yield positive symptoms of hallucinations? We hypothesize that selective impairments in functionally distinct signals of CD and EC during motor-to-sensory transformation cause the positive symptoms of hallucinations. […] Impairment of the inhibitory functions in motor-to-sensory transformation may result in self-monitoring malfunction and lead to auditory hallucinations.
  • #54 Impaired motor-to-sensory transformation mediates auditory hallucinations | PLOS Biology
    https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3002836
    The symptoms of AVHs are mediated by the impaired source monitoring function of CD that results in the absence of inhibition of auditory responses in the general speech preparation, as well as the imprecise activation function of EC that results in the varied enhancement and sensitization of auditory cortex during specific speech preparation. These results suggest that broken CD plus noisy EC causes erroneous monitoring of the imprecise generation of internal auditory representation and hence yields AVHs.
  • #55 Auditory Hallucinations: What’s It Like Hearing Voices? | HealthyPlace
    https://cf.healthyplace.com/thought-disorders/schizophrenia-articles/auditory-hallucinations-whats-it-like-hearing-voices
    The second idea is that deprivation of social interaction – namely human conversation – makes the brain more likely to produce hallucinated conversations. […] Third, heightened emotions may play a role in producing voices. […] Our hypothesis is that voices arise from different combinations of these three factors – reduced brain integration, social isolation, and high levels of emotionality.
  • #56 Auditory hallucinations activate language and verbal short-term memory, but not auditory, brain regions | Scientific Reports
    https://www.nature.com/articles/s41598-021-98269-1
    Auditory verbal hallucinations (AVH, hearing voices) are an important symptom of schizophrenia but their biological basis is not well understood. One longstanding approach proposes that they are perceptual in nature, specifically that they reflect spontaneous abnormal neuronal activity in the auditory cortex, perhaps with additional top down cognitive influences. […] Here, using a novel variant of the symptom capture technique, we show that the experience of AVH does not induce auditory cortex activation, even while real speech does, something that effectively rules out all theories that propose a perceptual component to AVH. Instead, we find that the experience of AVH activates language regions and/or regions that are engaged during verbal short-term memory. […] Theoretical approaches to AVH include so-called cognitive models, which argue that they are a manifestation of non-perceptual processes, for example inner speech that fails to be labeled as internally generated, or memories whose vividness and/or intrusiveness leads them to be misinterpreted as perceptions.
  • #57 Auditory hallucinations activate language and verbal short-term memory, but not auditory, brain regions | Scientific Reports
    https://www.nature.com/articles/s41598-021-98269-1
    The other main approach, the neurological or perceptual model, proposes that AVH are in some sense genuinely perceptual in nature. […] This failure, coupled with the fact that perception of formally similar real speech strongly activated a large expanse of the superior temporal cortex, would seem to exclude theoretical approaches to AVH in schizophrenia that invoke abnormal neuronal activity in the auditory cortex. […] While, as noted above, activations in motor areas may simply have reflected the act of button-pressing, our finding of activations in Brocas and Wernickes areas could be taken to suggest that the experience of AVH involves mechanisms that normally participate in the processing of speech. […] Since verbal short-term memory equates to some extent with the concept of inner speech, our findings could therefore be interpreted as providing support for Friths mislabelled inner speech theory of AVH.
  • #58 Auditory hallucinations activate language and verbal short-term memory, but not auditory, brain regions | Scientific Reports
    https://www.nature.com/articles/s41598-021-98269-1
    The other main approach, the neurological or perceptual model, proposes that AVH are in some sense genuinely perceptual in nature. […] This failure, coupled with the fact that perception of formally similar real speech strongly activated a large expanse of the superior temporal cortex, would seem to exclude theoretical approaches to AVH in schizophrenia that invoke abnormal neuronal activity in the auditory cortex. […] While, as noted above, activations in motor areas may simply have reflected the act of button-pressing, our finding of activations in Brocas and Wernickes areas could be taken to suggest that the experience of AVH involves mechanisms that normally participate in the processing of speech. […] Since verbal short-term memory equates to some extent with the concept of inner speech, our findings could therefore be interpreted as providing support for Friths mislabelled inner speech theory of AVH.
  • #59 Auditory Hallucinations: What’s It Like Hearing Voices? | HealthyPlace
    https://cf.healthyplace.com/thought-disorders/schizophrenia-articles/auditory-hallucinations-whats-it-like-hearing-voices
    The second idea is that deprivation of social interaction – namely human conversation – makes the brain more likely to produce hallucinated conversations. […] Third, heightened emotions may play a role in producing voices. […] Our hypothesis is that voices arise from different combinations of these three factors – reduced brain integration, social isolation, and high levels of emotionality.
  • #60 Auditory Hallucinations – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK557633/
    The precise mechanism by which paracusias occur remains elusive. However, several postulations have been suggested. Functional magnetic resonance imaging findings have demonstrated the spontaneous activation of the auditory network, consisting of the left superior temporal gyrus, transverse temporal gyri (Heschl gyri), and the left temporal lobe. A neurocognitive model called the VOICE model has been offered, which attributes the paracusias to an unbalanced bottom-up limbic hyperexcitation mismatched against a hypoactive prefrontal inhibitory system. This mismatch results in the spontaneous firing of sensory neurons without appropriate inhibitory mechanisms. Some data suggest that the thalamus-amygdala pathways are activated, thereby processing an emotional response to the auditory hallucinations, which is further proved by another study detecting choline and N-acetyl aspirate ratio abnormalities in the thalamus. At a neurochemical level, dopamine (D2) and serotonin (5HT2a) receptors are particularly important. Neuroimaging studies have demonstrated increased D2 receptor occupancy in the striatal system and 5HT2a receptor occupancy in the caudate nucleus.
  • #61 Auditory Hallucinations: What’s It Like Hearing Voices? | HealthyPlace
    https://cf.healthyplace.com/thought-disorders/schizophrenia-articles/auditory-hallucinations-whats-it-like-hearing-voices
    The second idea is that deprivation of social interaction – namely human conversation – makes the brain more likely to produce hallucinated conversations. […] Third, heightened emotions may play a role in producing voices. […] Our hypothesis is that voices arise from different combinations of these three factors – reduced brain integration, social isolation, and high levels of emotionality.
  • #62 Azthena logo with the word Azthena
    https://www.news-medical.net/health/What-Causes-Hearing-Voices.aspx
    The phenomenon of hearing voices inside the head, which others cannot, can be categorized as a common form of auditory hallucination. Hallucination is the perception or sensation of voices that can be heard by a person when they are awake and gives the feeling of being real. […] There are many significant factors that can cause hearing voices. The major factors that contribute to this condition are stress, anxiety, depression, and traumatic experiences. In some cases, there might be environmental and genetic factors that cause such hearing of voices. […] There are several possible causes that that may cause people to hear voices, including: Traumatic incidents – Hearing of voices might be the result of a traumatic incident that occurred in the early life of the patient, while hearing one or more voices might be a result of his experiencing a disassociate disorder.
  • #63 Azthena logo with the word Azthena
    https://www.news-medical.net/health/What-Causes-Hearing-Voices.aspx
    The phenomenon of hearing voices inside the head, which others cannot, can be categorized as a common form of auditory hallucination. Hallucination is the perception or sensation of voices that can be heard by a person when they are awake and gives the feeling of being real. […] There are many significant factors that can cause hearing voices. The major factors that contribute to this condition are stress, anxiety, depression, and traumatic experiences. In some cases, there might be environmental and genetic factors that cause such hearing of voices. […] There are several possible causes that that may cause people to hear voices, including: Traumatic incidents – Hearing of voices might be the result of a traumatic incident that occurred in the early life of the patient, while hearing one or more voices might be a result of his experiencing a disassociate disorder.
  • #64 The Propensity to Hear “Voices” in Schizophrenia May Be Established by Infancy, Many Years Before Symptom Onset | Mount Sinai – New York
    https://www.mountsinai.org/about/newsroom/2019/the-propensity-to-hear-voices-in-schizophrenia-may-be-established-by-infancy-many-years-before-symptom-onset
    […] Because the tonotopic map is established when people are still infants and remains stable throughout life, our study findings suggest that the vulnerability to develop “voices” is linked a deviance in the organization of the auditory system that occurs during infancy and precedes speech development and the onset of psychotic symptoms by many years. […] According to the authors, in addition to helping doctors spot people who are likely to experience hallucinations before the symptoms appear or become severe, the auditory cortex may be an area of consideration for novel neurmodulation methods to help patients who already have symptoms.
  • #65 The Propensity to Hear “Voices” in Schizophrenia May Be Established by Infancy, Many Years Before Symptom Onset | Mount Sinai – New York
    https://www.mountsinai.org/about/newsroom/2019/the-propensity-to-hear-voices-in-schizophrenia-may-be-established-by-infancy-many-years-before-symptom-onset
    […] Because the tonotopic map is established when people are still infants and remains stable throughout life, our study findings suggest that the vulnerability to develop “voices” is linked a deviance in the organization of the auditory system that occurs during infancy and precedes speech development and the onset of psychotic symptoms by many years. […] According to the authors, in addition to helping doctors spot people who are likely to experience hallucinations before the symptoms appear or become severe, the auditory cortex may be an area of consideration for novel neurmodulation methods to help patients who already have symptoms.
  • #66
    https://www.psychosisnet.com/psychosis/symptoms-of-psychosis/hearing-voices/
    Hearing voices in your head happens to many people. For the voice hearer, the voices are very real but others cannot hear them. A lot of people associate hearing voices with schizophrenia. But it is not really that unusual and you can, with the right help, learn to deal with it. Therefore, if people are hearing voices, the diagnosis really should be that: hearing voices. […] There is a lot of mystery around hearing voices. Maybe because we do not really know yet what causes it. Like so many mental experiences, hearing voices never has a single clear cause. Usually the cause is a combination of current circumstances and past experiences, particularly childhood adverse experiences. […] Sometimes there are multiple voice hearers in a single family. Although there are known instances where hearing voices was shown to run in the family, there is no clear genetic cause. Things that run in the family may also be caused by traumatic experiences clustering in that family. Some people start hearing voices in their childhood, others at a later age.
  • #67 Hearing Voices in Schizophrenia I Psych Central
    https://psychcentral.com/schizophrenia/schizophrenia-voices
    It was also noted that excitatory neurotransmitters and amygdala functioning might skew the emotional undertones of voices being heard. […] Researchers are still unclear why auditory hallucinations shift over time, happen spontaneously, or eventually stop completely. […] Theres also no indication of why hearing voices is predominantly seen in some mental health conditions such as schizophrenia, as opposed to other neurological conditions such as Parkinsons disease or epilepsy. […] In a 2021 study, researchers noted a number of factors in schizophrenia that could be involved beyond those affecting the auditory and language areas of the brain. […] These factors include genetics, changes in your levels of glutamate, a neurotransmitter that sends messages in the brain and nerves, electroencephalographic alterations in the brain, changes in the white matter of the brain, and cortical structure. […] If you live with schizophrenia, auditory hallucinations such as hearing voices are not uncommon. With treatment and support, you can learn to manage and reduce the severity of your symptoms.
  • #68 How robots make people hear voices
    https://www.snf.ch/en/TT4Y8OOLU2tLtKJo/news/how-robots-make-people-hear-voices
    Researchers have developed a method for triggering auditory hallucinations in healthy people. They are investigating the causes of a phenomenon that can be a huge burden for people with psychiatric illnesses. […] Studies indicate that five to ten per cent of all people sometimes hear voices those of dead relatives or higher beings, for example without having any kind of illness. In other words, the phenomenon is not restricted to people with psychiatric disorders, as is generally assumed. However, hallucinations do frequently accompany such illnesses. […] Orepic believes that the threshold between harmless and pathological hallucinations is fluid anyway: one criterion could be whether hearing voices impacts peoples lives negatively, making them self-harm, for example, or preventing them from leading autonomous lives. Conversely, voices can be harmless or even benign for example if someone hears the voice of their dead grandmother who offers good advice. […] Our study confirms that the mechanisms behind the hallucinations are actually in everyones brain, Orepic says. But for some reason, some people are more susceptible to them than others.
  • #69 How robots make people hear voices
    https://www.snf.ch/en/TT4Y8OOLU2tLtKJo/news/how-robots-make-people-hear-voices
    Researchers have developed a method for triggering auditory hallucinations in healthy people. They are investigating the causes of a phenomenon that can be a huge burden for people with psychiatric illnesses. […] Studies indicate that five to ten per cent of all people sometimes hear voices those of dead relatives or higher beings, for example without having any kind of illness. In other words, the phenomenon is not restricted to people with psychiatric disorders, as is generally assumed. However, hallucinations do frequently accompany such illnesses. […] Orepic believes that the threshold between harmless and pathological hallucinations is fluid anyway: one criterion could be whether hearing voices impacts peoples lives negatively, making them self-harm, for example, or preventing them from leading autonomous lives. Conversely, voices can be harmless or even benign for example if someone hears the voice of their dead grandmother who offers good advice. […] Our study confirms that the mechanisms behind the hallucinations are actually in everyones brain, Orepic says. But for some reason, some people are more susceptible to them than others.
  • #70 How robots make people hear voices
    https://www.snf.ch/en/TT4Y8OOLU2tLtKJo/news/how-robots-make-people-hear-voices
    Researchers have developed a method for triggering auditory hallucinations in healthy people. They are investigating the causes of a phenomenon that can be a huge burden for people with psychiatric illnesses. […] Studies indicate that five to ten per cent of all people sometimes hear voices those of dead relatives or higher beings, for example without having any kind of illness. In other words, the phenomenon is not restricted to people with psychiatric disorders, as is generally assumed. However, hallucinations do frequently accompany such illnesses. […] Orepic believes that the threshold between harmless and pathological hallucinations is fluid anyway: one criterion could be whether hearing voices impacts peoples lives negatively, making them self-harm, for example, or preventing them from leading autonomous lives. Conversely, voices can be harmless or even benign for example if someone hears the voice of their dead grandmother who offers good advice. […] Our study confirms that the mechanisms behind the hallucinations are actually in everyones brain, Orepic says. But for some reason, some people are more susceptible to them than others.
  • #71 Auditory Hallucinations – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK557633/
    To differentiate the causes of auditory hallucinations, it is pertinent to focus on the following: A detailed medical history, laboratory analyses, and neuroimaging are needed to rule out organic etiologies. Details regarding substance use (illicit and over the counter), medication profiles, and supplement use to rule out toxic-metabolic causes. Detailed psychiatric family history, as many psychiatric illnesses show high heritability. […] If the etiology is of an organic nature, the prognosis is contingent upon the underlying disease process. Therefore, the hallucinations should, in theory, resolve as the precipitant resolves. However, when the perceptual anomaly occurs in the setting of a primary psychiatric disorder, the remittance of the paracusias is more independent. Evidence demonstrates that the positive symptoms of schizophrenia respond well to the administration of neuroleptics; however, the actual psychotic disorder does not. Thus, the resolution of the hallucinations does not necessarily indicate the resolution of the underlying thought disorder.
  • #72 Auditory Hallucinations: Causes, Symptoms, Types & Treatment
    https://my.clevelandclinic.org/health/symptoms/23233-auditory-hallucinations
    Auditory hallucinations happen when you hear voices or noises that dont exist in reality. In some cases, theyre temporary and harmless, while in others, they may be a sign of a more serious mental health or neurological condition. Auditory hallucinations have many possible causes. […] Auditory hallucinations are often associated with schizophrenia and other mental health conditions, but they can happen for several other reasons, such as hearing loss, and arent always a sign of a mental health condition. […] Approximately 75% of people with schizophrenia experience auditory hallucinations usually hearing voices. […] People with other mental health conditions can experience auditory hallucinations. They affect: 20% to 50% of people with bipolar disorder. 40% of people with post-traumatic stress disorder (PTSD). 14% of people with an anxiety disorder. 10% of people with major depression.
  • #73 Auditory Hallucinations: Causes, Symptoms, Types & Treatment
    https://my.clevelandclinic.org/health/symptoms/23233-auditory-hallucinations
    Auditory hallucinations occur in 16% of adults with hearing impairment, which can take two forms: simple hallucinations (tinnitus) and complex hallucinations (speech and music). […] Several neurological conditions can cause auditory hallucinations, including: Sleep disorders, such as narcolepsy and insomnia. Parkinsons disease. Stroke. Migraine. Brain tumors or lesions in your temporal lobe, brainstem or thalamus. […] Several other usually temporary conditions and situations can cause auditory hallucinations, including: Alcohol and recreational drug use. Lack of sleep. Extreme hunger. Certain prescribed medications (as a side effect). Extreme stress or grief. Infections, such as UTIs, especially in people who are older. Recovering from anesthesia after a surgery or procedure. […] The treatment for auditory hallucinations depends on the cause. Hallucinations caused by temporary conditions, such as extreme hunger or lack of sleep, will stop once the underlying condition has been treated or resolved.
  • #74 Auditory Hallucinations: Causes, Symptoms, Types & Treatment
    https://my.clevelandclinic.org/health/symptoms/23233-auditory-hallucinations
    Healthcare providers only prescribe medication to manage auditory hallucinations if theyre part of an underlying chronic condition. […] For people with mental health conditions who experience auditory hallucinations, psychotherapy (talk therapy) can help in conjunction with medication. […] Auditory hallucinations have several causes some of which are normal and harmless. But if youre experiencing auditory hallucinations that are causing you distress, talk to your healthcare provider.
  • #75 Auditory Hallucinations: Causes, Symptoms, Types & Treatment
    https://my.clevelandclinic.org/health/symptoms/23233-auditory-hallucinations
    Healthcare providers only prescribe medication to manage auditory hallucinations if theyre part of an underlying chronic condition. […] For people with mental health conditions who experience auditory hallucinations, psychotherapy (talk therapy) can help in conjunction with medication. […] Auditory hallucinations have several causes some of which are normal and harmless. But if youre experiencing auditory hallucinations that are causing you distress, talk to your healthcare provider.
  • #76 Auditory Hallucinations – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK557633/
    To differentiate the causes of auditory hallucinations, it is pertinent to focus on the following: A detailed medical history, laboratory analyses, and neuroimaging are needed to rule out organic etiologies. Details regarding substance use (illicit and over the counter), medication profiles, and supplement use to rule out toxic-metabolic causes. Detailed psychiatric family history, as many psychiatric illnesses show high heritability. […] If the etiology is of an organic nature, the prognosis is contingent upon the underlying disease process. Therefore, the hallucinations should, in theory, resolve as the precipitant resolves. However, when the perceptual anomaly occurs in the setting of a primary psychiatric disorder, the remittance of the paracusias is more independent. Evidence demonstrates that the positive symptoms of schizophrenia respond well to the administration of neuroleptics; however, the actual psychotic disorder does not. Thus, the resolution of the hallucinations does not necessarily indicate the resolution of the underlying thought disorder.
  • #77 Auditory Hallucinations | Charlie Health
    https://www.charliehealth.com/areas-of-care/psychosis/auditory-hallucinations
    Cognitive behavioral therapy (CBT) is a valuable tool for helping individuals challenge and reframe distressing hallucinations. […] It is crucial to seek professional support if auditory hallucinations cause significant distress, interfere with daily life, or lead to unsafe behaviors. […] If hallucinations or psychosis are affecting your mental health, Charlie Health is here to help.
  • #78 Auditory Hallucinations in Schizophrenia – Psychiatry Advisor
    https://www.psychiatryadvisor.com/features/auditory-hallucinations-in-schizophrenia-dysfunction/
    When the root cause of auditory hallucinations can be traced to trauma, Dr Hayward opines that for some patients, it can be important to revisit and generate new meanings around these root causes. […] As new research throws more light on the neuronal basis of auditory hallucinations and different pharmacological and psychological approaches are designed to treat auditory hallucinations, it is important to understand the individual differences of those with schizophrenia and plan treatment accordingly. […] Patients who are distressed by hearing voices often have a complex range of needs and mental health problems that require a biopsychosocial approach to care and treatment.
  • #79 Understanding voices – Living With Schizophrenia
    https://livingwithschizophreniauk.org/information-sheets/understanding-voice-hearing/
    Persecutory or nasty voices are one of the most common and often one of the most disabling of symptoms for people living with schizophrenia. […] If you have schizophrenia then using alcohol or street drugs will make your voices worse. […] Some studies have found that when people with schizophrenia use alcohol or street drugs their voices will often get worse, and as with the other psychotic symptoms the voices will also get worse when the sufferer is under pressure emotionally and psychologically, particularly if they are experiencing open hostility. […] However, anti-psychotic medication is very effective in helping people to deal with voices. […] About 70-80% of people with schizophrenia will experience an improvement in their symptoms when they take anti-psychotic medication. […] Some work has been carried out into the use of cognitive behavioural therapy to treat voices.
  • #80 Hearing Voices — Department of Psychiatry
    https://www.psych.ox.ac.uk/news/hearing-voices
    Two thirds of people who experience auditory hallucinations will hear voices which criticise or threaten them. […] The voices can seem incredibly real, and are often described as being very believable and difficult to ignore (Sheaves et al., 2020). Understandably they have a powerful impact on the individual. […] The study uncovered the following as factors that lead to social isolation for people who hear voices: Difficulties during conversations, for example, concentrating on someone talking whilst also hearing voices is hard and tiring; Negative expectations of interactions, for example, fearing stigma and negative judgement; Difficulties sharing experiences of voices, for example, a selfless concern that talking about voices will leave others feeling upset. […] Several interviews revealed that social support was a crucial step in the process of recovery.
  • #81 Hearing Voices — Department of Psychiatry
    https://www.psych.ox.ac.uk/news/hearing-voices
    Speaking to people helped provide distraction from the abusive comments made by voices, it provided an opportunity to gather other information in an effort to question the nasty things the voices said and some actually described hearing nasty voices less often when they were around others. The research suggests that connecting with people could well be an important vehicle in helping people to manage nasty voices, but this requires testing in future research.
  • #82 Hearing Voices — Department of Psychiatry
    https://www.psych.ox.ac.uk/news/hearing-voices
    Two thirds of people who experience auditory hallucinations will hear voices which criticise or threaten them. […] The voices can seem incredibly real, and are often described as being very believable and difficult to ignore (Sheaves et al., 2020). Understandably they have a powerful impact on the individual. […] The study uncovered the following as factors that lead to social isolation for people who hear voices: Difficulties during conversations, for example, concentrating on someone talking whilst also hearing voices is hard and tiring; Negative expectations of interactions, for example, fearing stigma and negative judgement; Difficulties sharing experiences of voices, for example, a selfless concern that talking about voices will leave others feeling upset. […] Several interviews revealed that social support was a crucial step in the process of recovery.
  • #83 What happens in the brain when people with schizophrenia hear voices
    https://www.statnews.com/2024/10/03/schizophrenia-hallucination-voices-brain-process-research/
    Schizophrenia is a poorly understood illness, but scientists now have greater insight into one of the disorders hallmarks, auditory hallucinations, thanks to new research published Thursday. […] People with schizophrenia often hear voices and sounds even when there are none up to 80% of people with the mental illness have auditory hallucinations. Scientists have theorized that this happens when a person with schizophrenia struggles to recognize inner speech as self-generated. […] If you look into the cognitive neuroscience research on auditory hallucinations, they always talk about the patients losing the self, losing their agency, that they may have a breakdown in the inhibition function that separates the external world and internal world, said Xing Tian, the studys lead author and an associate professor of Neural and Cognitive Sciences at NYU Shanghai.
  • #84 What happens in the brain when people with schizophrenia hear voices
    https://www.statnews.com/2024/10/03/schizophrenia-hallucination-voices-brain-process-research/
    Schizophrenia is a poorly understood illness, but scientists now have greater insight into one of the disorders hallmarks, auditory hallucinations, thanks to new research published Thursday. […] People with schizophrenia often hear voices and sounds even when there are none up to 80% of people with the mental illness have auditory hallucinations. Scientists have theorized that this happens when a person with schizophrenia struggles to recognize inner speech as self-generated. […] If you look into the cognitive neuroscience research on auditory hallucinations, they always talk about the patients losing the self, losing their agency, that they may have a breakdown in the inhibition function that separates the external world and internal world, said Xing Tian, the studys lead author and an associate professor of Neural and Cognitive Sciences at NYU Shanghai.
  • #85 What happens in the brain when people with schizophrenia hear voices
    https://www.statnews.com/2024/10/03/schizophrenia-hallucination-voices-brain-process-research/
    The researchers hope that a deeper mechanistic understanding of the illness will also help expand treatment options beyond drugs. […] You cant treat what you dont understand, and this absence of understanding has stymied the development of new treatments, which havent really changed much in 40 years. […] For people with schizophrenia, these expectations are skewed. Passivity experiences, another disease hallmark, lead many people to believe that an external agent is controlling them. […] While Tian and his colleagues agree this disruption leaves an opening for these auditory hallucinations to occur, their recent study suggests misfiring signals also add elements in addition to their dysregulated suppression. […] What they found was that every person with schizophrenia displayed broken and noisy motor signals, and that the interplay of these wonky signals fed into each other and led to hallucinations. […] If our theory is right, then using a noninvasive neuromodulation technique can alleviate the hallucinations.
  • #86 What happens in the brain when people with schizophrenia hear voices
    https://www.statnews.com/2024/10/03/schizophrenia-hallucination-voices-brain-process-research/
    The researchers hope that a deeper mechanistic understanding of the illness will also help expand treatment options beyond drugs. […] You cant treat what you dont understand, and this absence of understanding has stymied the development of new treatments, which havent really changed much in 40 years. […] For people with schizophrenia, these expectations are skewed. Passivity experiences, another disease hallmark, lead many people to believe that an external agent is controlling them. […] While Tian and his colleagues agree this disruption leaves an opening for these auditory hallucinations to occur, their recent study suggests misfiring signals also add elements in addition to their dysregulated suppression. […] What they found was that every person with schizophrenia displayed broken and noisy motor signals, and that the interplay of these wonky signals fed into each other and led to hallucinations. […] If our theory is right, then using a noninvasive neuromodulation technique can alleviate the hallucinations.
  • #87 The Propensity to Hear “Voices” in Schizophrenia May Be Established by Infancy, Many Years Before Symptom Onset | Mount Sinai – New York
    https://www.mountsinai.org/about/newsroom/2019/the-propensity-to-hear-voices-in-schizophrenia-may-be-established-by-infancy-many-years-before-symptom-onset
    Some people suffering from severe mental illness, particularly schizophrenia, hear “voices,” known as auditory hallucinations. This symptom, which afflicts more than 80% of patients, is among the most prevalent and distressing symptoms of schizophrenia. […] Uncovering the biological origins of auditory hallucinations is essential for reducing their contribution to the disease burden of schizophrenia. […] To investigate the biological origins of hearing “voices” in patients with schizophrenia, a team led by researchers at the Icahn School of Medicine at Mount Sinai used ultra-high field imaging to compare the auditory cortex of schizophrenic patients with healthy individuals. […] The study findings suggest that the vulnerability to develop “voices” is probably established many years before symptoms begin.
  • #88 The Propensity to Hear “Voices” in Schizophrenia May Be Established by Infancy, Many Years Before Symptom Onset | Mount Sinai – New York
    https://www.mountsinai.org/about/newsroom/2019/the-propensity-to-hear-voices-in-schizophrenia-may-be-established-by-infancy-many-years-before-symptom-onset
    […] Because the tonotopic map is established when people are still infants and remains stable throughout life, our study findings suggest that the vulnerability to develop “voices” is linked a deviance in the organization of the auditory system that occurs during infancy and precedes speech development and the onset of psychotic symptoms by many years. […] According to the authors, in addition to helping doctors spot people who are likely to experience hallucinations before the symptoms appear or become severe, the auditory cortex may be an area of consideration for novel neurmodulation methods to help patients who already have symptoms.
  • #89 What happens in the brain when people with schizophrenia hear voices
    https://www.statnews.com/2024/10/03/schizophrenia-hallucination-voices-brain-process-research/
    The researchers hope that a deeper mechanistic understanding of the illness will also help expand treatment options beyond drugs. […] You cant treat what you dont understand, and this absence of understanding has stymied the development of new treatments, which havent really changed much in 40 years. […] For people with schizophrenia, these expectations are skewed. Passivity experiences, another disease hallmark, lead many people to believe that an external agent is controlling them. […] While Tian and his colleagues agree this disruption leaves an opening for these auditory hallucinations to occur, their recent study suggests misfiring signals also add elements in addition to their dysregulated suppression. […] What they found was that every person with schizophrenia displayed broken and noisy motor signals, and that the interplay of these wonky signals fed into each other and led to hallucinations. […] If our theory is right, then using a noninvasive neuromodulation technique can alleviate the hallucinations.
  • #90 The Propensity to Hear “Voices” in Schizophrenia May Be Established by Infancy, Many Years Before Symptom Onset | Mount Sinai – New York
    https://www.mountsinai.org/about/newsroom/2019/the-propensity-to-hear-voices-in-schizophrenia-may-be-established-by-infancy-many-years-before-symptom-onset
    […] Because the tonotopic map is established when people are still infants and remains stable throughout life, our study findings suggest that the vulnerability to develop “voices” is linked a deviance in the organization of the auditory system that occurs during infancy and precedes speech development and the onset of psychotic symptoms by many years. […] According to the authors, in addition to helping doctors spot people who are likely to experience hallucinations before the symptoms appear or become severe, the auditory cortex may be an area of consideration for novel neurmodulation methods to help patients who already have symptoms.
  • #91 Hallucinations: Etiology and clinical implications
    https://pmc.ncbi.nlm.nih.gov/articles/PMC2996210/
    The literature on hallucinations is reviewed, including history; theoretical background from physiological, biochemical and psychological points of view; classification; causation; presentation in different psychiatric and neurological disorders and in normal persons. […] Although the exact cause and pathogenesis of hallucinations are not known, evidence points toward multiple etiological factors for the hallucinatory phenomenon. […] In schizophrenia (SCZ), there is evidence that very high levels of dopamine in the limbic system play a major role in emergence of hallucinations and delusions. […] A deranged cholinergic neurotransmission has also been involved in the pathophysiology of hallucinations. […] Serotonin has also been implicated in the causation of hallucinations, based on the fact that a number of hallucinogenic drugs, like lysergic acid diethylamide (LSD), mescaline, psilocybin and ecstasy, appear to act, at least in part, as serotonin 5 HT2A receptor agonist or partial agonists.
  • #92 Hallucinations: Etiology and clinical implications
    https://pmc.ncbi.nlm.nih.gov/articles/PMC2996210/
    The literature on hallucinations is reviewed, including history; theoretical background from physiological, biochemical and psychological points of view; classification; causation; presentation in different psychiatric and neurological disorders and in normal persons. […] Although the exact cause and pathogenesis of hallucinations are not known, evidence points toward multiple etiological factors for the hallucinatory phenomenon. […] In schizophrenia (SCZ), there is evidence that very high levels of dopamine in the limbic system play a major role in emergence of hallucinations and delusions. […] A deranged cholinergic neurotransmission has also been involved in the pathophysiology of hallucinations. […] Serotonin has also been implicated in the causation of hallucinations, based on the fact that a number of hallucinogenic drugs, like lysergic acid diethylamide (LSD), mescaline, psilocybin and ecstasy, appear to act, at least in part, as serotonin 5 HT2A receptor agonist or partial agonists.
  • #93 Auditory hallucination – Wikipedia
    https://en.wikipedia.org/wiki/Auditory_hallucination
    It is assumed through research that the neural pathways involved in normal speech perception and production, which are lateralized to the left temporal lobe, also underlie auditory hallucinations. […] Auditory hallucinations correspond with spontaneous neural activity of the left temporal lobe, and the subsequent primary auditory cortex. The perception of auditory hallucinations corresponds to the experience of actual external hearing, despite the absence of any sound itself. […] In people with psychosis, the premier cause of auditory hallucinations is schizophrenia, and these are known as auditory verbal hallucinations (AVHs). […] The causal basis of hallucinations has been explored on the cellular receptor level. The glutamate hypothesis, proposed as a possible cause for schizophrenia, may also have implications in auditory hallucinations, which are suspected to be triggered by altered glutamatergic transmission.
  • #94 Hallucinations: Etiology and clinical implications
    https://pmc.ncbi.nlm.nih.gov/articles/PMC2996210/
    A possible role of glutamate in hallucinations is suggested by the finding that glutamate antagonists like phencyclidine and ketamine can induce hallucinations. […] Hallucinations cause sensory modality-specific activation in cerebral areas involved in normal sensation. […] Hallucinations can be seen as erroneous perception or sensory deception. […] Most recent models of hallucinations assume that hallucinations are related to misattribution of private events. […] Some studies provide evidence for Bentalls notion that hallucinators are impaired in their ability to discriminate between real and imagined events and reveal a specific bias towards attributing their thoughts to an external source. […] Morrison is in agreement with the theory that hallucinations are internal cognitive events that are misattributed to an external source. […] Hallucination is a fundamental symptom in psychiatry. […] Conventionally, hallucinations are treated as psychotic features. However, there is ample evidence to support the fact that hallucination could be present in nonpsychotic conditions.
  • #95 Auditory Hallucinations: What’s It Like Hearing Voices? | HealthyPlace
    https://cf.healthyplace.com/thought-disorders/schizophrenia-articles/auditory-hallucinations-whats-it-like-hearing-voices
    The second idea is that deprivation of social interaction – namely human conversation – makes the brain more likely to produce hallucinated conversations. […] Third, heightened emotions may play a role in producing voices. […] Our hypothesis is that voices arise from different combinations of these three factors – reduced brain integration, social isolation, and high levels of emotionality.
  • #96 Auditory Hallucinations: Causes, Symptoms, Types & Treatment
    https://my.clevelandclinic.org/health/symptoms/23233-auditory-hallucinations
    Auditory hallucinations occur in 16% of adults with hearing impairment, which can take two forms: simple hallucinations (tinnitus) and complex hallucinations (speech and music). […] Several neurological conditions can cause auditory hallucinations, including: Sleep disorders, such as narcolepsy and insomnia. Parkinsons disease. Stroke. Migraine. Brain tumors or lesions in your temporal lobe, brainstem or thalamus. […] Several other usually temporary conditions and situations can cause auditory hallucinations, including: Alcohol and recreational drug use. Lack of sleep. Extreme hunger. Certain prescribed medications (as a side effect). Extreme stress or grief. Infections, such as UTIs, especially in people who are older. Recovering from anesthesia after a surgery or procedure. […] The treatment for auditory hallucinations depends on the cause. Hallucinations caused by temporary conditions, such as extreme hunger or lack of sleep, will stop once the underlying condition has been treated or resolved.
  • #97 Auditory Hallucinations in Schizophrenia
    https://www.webmd.com/schizophrenia/auditory-hallucinations
    Auditory hallucinations are when you hear voices or other sounds that no one else hears. […] Up to 80% of people with schizophrenia say they have auditory hallucinations, with hearing voices being the most common. […] Schizophrenia is one of the most common causes of auditory hallucinations, but there are many other reasons you might hear things that arent there, including: […] Other mental illnesses. Hearing voices can sometimes happen with other mental illnesses as well, including: […] Alcohol. Heavy drinking can cause you to see things that arent there. […] Alzheimers disease and other types of dementia. […] Brain tumors. Hearing things doesnt mean you have a brain tumor. […] Drugs. Certain street drugs, such as ecstasy and LSD, can make you see and hear things that arent there.
  • #98 Auditory Hallucinations: Causes, Symptoms, Types & Treatment
    https://my.clevelandclinic.org/health/symptoms/23233-auditory-hallucinations
    Auditory hallucinations happen when you hear voices or noises that dont exist in reality. In some cases, theyre temporary and harmless, while in others, they may be a sign of a more serious mental health or neurological condition. Auditory hallucinations have many possible causes. […] Auditory hallucinations are often associated with schizophrenia and other mental health conditions, but they can happen for several other reasons, such as hearing loss, and arent always a sign of a mental health condition. […] Approximately 75% of people with schizophrenia experience auditory hallucinations usually hearing voices. […] People with other mental health conditions can experience auditory hallucinations. They affect: 20% to 50% of people with bipolar disorder. 40% of people with post-traumatic stress disorder (PTSD). 14% of people with an anxiety disorder. 10% of people with major depression.
  • #99 What happens in the brain when people with schizophrenia hear voices
    https://www.statnews.com/2024/10/03/schizophrenia-hallucination-voices-brain-process-research/
    The researchers hope that a deeper mechanistic understanding of the illness will also help expand treatment options beyond drugs. […] You cant treat what you dont understand, and this absence of understanding has stymied the development of new treatments, which havent really changed much in 40 years. […] For people with schizophrenia, these expectations are skewed. Passivity experiences, another disease hallmark, lead many people to believe that an external agent is controlling them. […] While Tian and his colleagues agree this disruption leaves an opening for these auditory hallucinations to occur, their recent study suggests misfiring signals also add elements in addition to their dysregulated suppression. […] What they found was that every person with schizophrenia displayed broken and noisy motor signals, and that the interplay of these wonky signals fed into each other and led to hallucinations. […] If our theory is right, then using a noninvasive neuromodulation technique can alleviate the hallucinations.
  • #100 The Propensity to Hear “Voices” in Schizophrenia May Be Established by Infancy, Many Years Before Symptom Onset | Mount Sinai – New York
    https://www.mountsinai.org/about/newsroom/2019/the-propensity-to-hear-voices-in-schizophrenia-may-be-established-by-infancy-many-years-before-symptom-onset
    […] Because the tonotopic map is established when people are still infants and remains stable throughout life, our study findings suggest that the vulnerability to develop “voices” is linked a deviance in the organization of the auditory system that occurs during infancy and precedes speech development and the onset of psychotic symptoms by many years. […] According to the authors, in addition to helping doctors spot people who are likely to experience hallucinations before the symptoms appear or become severe, the auditory cortex may be an area of consideration for novel neurmodulation methods to help patients who already have symptoms.