Materiały źródłowe

• #1 Posttraumatic Stress Disorder – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK559129/

  Posttraumatic stress disorder (PTSD) is a prevalent and complex psychiatric condition that arises in response to exposure to traumatic events, significantly impacting an individual’s mental well-being. Characterized by a diverse array of symptoms, PTSD can affect cognition, mood, somatic experiences, and behavior, leading to chronic impairments and an elevated risk of comorbid psychiatric illnesses, including an increased susceptibility to suicide. […] The management of PTSD is complex, as each case of trauma is individualized, and specific symptoms of PTSD vary from case to case. Prevention and treatment methods involve psychological interventions as well as pharmacotherapy. […] The initial response to trauma is associated with the pathophysiology of PTSD. The response is characterized by a surge of adrenaline from sympathetic nervous system stimulation. Physiologically, this can lead to tachycardia, rising blood pressure, and further neuroendocrine responses such as the release of cortisol and other catecholamines. When the trauma stimulus is prolonged or repeated, a conditioned behavioral response leading to acute stress disorder or PTSD can occur.

• #1 Posttraumatic Stress Disorder: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288154-overview

  Posttraumatic stress disorder (PTSD) is a syndrome resulting from exposure to real or threatened serious injury or sexual assault. The signs and symptoms of PTSD appear to arise from complex interactions of psychological and neurobiological factors. Studies have found alterations in the amygdala, prefrontal cortex, hippocampus, and anterior cingulate, and corpus collosum as well as altered functioning of the hypothalamic pituitary axis (HPA). […] In addition to the psychological impact of experiencing a traumatic event, posttraumatic stress disorder (PTSD) frequently leads to changes in the anatomy and neurophysiology of the brain. Reduced size of the hippocampus is probably both a predisposing factor and a result of trauma. The amygdala, which is involved in processing emotions and modulating the fear response, seems to be overly reactive in patients with PTSD. The medial prefrontal cortex (mPFC), which exhibits inhibitory control over the stress response and emotional reactivity of the amygdala, appears to be smaller and less responsive in individuals with PTSD.

• #2 Posttraumatic Stress Disorder – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK559129/

  Neuroanatomically, the amygdala has significant responsibility for threat detection and fear response. […] In patients with PTSD, the toning down capacity of the frontal lobe is dysregulated compared to those without PTSD. This observation may partially explain the imaging findings of reduced brain volume in those individuals with chronic PTSD. […] Neurotransmitter levels have been investigated in those with PTSD, including serotonin, dopamine, epinephrine, norepinephrine, glutamate, and gamma-aminobutyric acid (GABA). Neurotransmitter levels in patients with PTSD have had inconsistent findings but still form the basis of an approach for treatment with psychotropic medications.

• #3 Post Traumatic Stress Disorder (PTSD): Symptoms & Cure | Ada

  https://ada.com/conditions/post-traumatic-stress-disorder/

  Post-traumatic stress disorder, also known as PTSD and sometimes written as post traumatic stress disorder or posttraumatic stress disorder, is a condition that sometimes develops after a person experiences or witnesses a life-threatening, terrifying or otherwise deeply traumatic event. […] Post-traumatic stress disorder can develop after a person of any age experiences or witnesses a deeply traumatic event often one that is life-threatening or perceived as life-threatening. […] A number of factors may increase the risk of a person developing the condition. […] The following factors are thought to contribute to the development of PTSD in military personnel: […] After taking a persons history and performing a physical examination, a healthcare practitioner will typically diagnose post-traumatic stress disorder using the following criteria:

• #4 Advances in Posttraumatic Stress Disorder (PTSD): A Primer

  https://psychscenehub.com/psychinsights/advances-posttraumatic-stress-disorder-ptsd/

  The neurobiology of PTSD is complex and involves neuroendocrine, neurochemical and neuroanatomical changes in neural networks. […] The amygdala, hippocampus, and mPFC form the core network for fear conditioning, involving acquisition, consolidation, and extinction of fear responses. […] In PTSD, amygdala hyperactivity persists due to inadequate inhibition from the mPFC, resulting in heightened responses to conditioned stimuli. […] The hippocampus is crucial for encoding fear memories, contextual processing, and regulating amygdala activation. […] In PTSD, decreased mPFC activity and compromised integrity of the uncinate fasciculus impair this regulatory function, contributing to the persistence of fear and avoidance behaviours. […] The neuroendocrine profile in PTSD suggests that treatments targeting glucocorticoid signalling may offer therapeutic benefits.

• #4 Posttraumatic Stress Disorder: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288154-overview

  Posttraumatic stress disorder (PTSD) is a syndrome resulting from exposure to real or threatened serious injury or sexual assault. The signs and symptoms of PTSD appear to arise from complex interactions of psychological and neurobiological factors. Studies have found alterations in the amygdala, prefrontal cortex, hippocampus, and anterior cingulate, and corpus collosum as well as altered functioning of the hypothalamic pituitary axis (HPA). […] In addition to the psychological impact of experiencing a traumatic event, posttraumatic stress disorder (PTSD) frequently leads to changes in the anatomy and neurophysiology of the brain. Reduced size of the hippocampus is probably both a predisposing factor and a result of trauma. The amygdala, which is involved in processing emotions and modulating the fear response, seems to be overly reactive in patients with PTSD. The medial prefrontal cortex (mPFC), which exhibits inhibitory control over the stress response and emotional reactivity of the amygdala, appears to be smaller and less responsive in individuals with PTSD.

• #5 Causes – Post-traumatic stress disorder – NHS

  https://www.nhs.uk/mental-health/conditions/post-traumatic-stress-disorder-ptsd/causes/

  In people with PTSD, parts of the brain involved in emotional processing appear different in brain scans. […] In people with PTSD, the hippocampus appears smaller in size. […] It’s thought that changes in this part of the brain may be related to fear and anxiety, memory problems and flashbacks. […] The malfunctioning hippocampus may prevent flashbacks and nightmares being properly processed, so the anxiety they generate does not reduce over time. […] Treatment of PTSD results in proper processing of the memories so, over time, the flashbacks and nightmares gradually disappear.

• #6 The Pathophysiology of Post-Traumatic Stress Disorder | Encyclopedia MDPI

  https://encyclopedia.pub/entry/50692

  Reduced cortisol levels and signaling in PTSD patients could be responsible for stronger sympathetic nervous system activation and extreme lucidity of traumatic memories. […] Notably, Robert Sapolsky claimed that, under stress, the body releases glucocorticoids, resulting in downregulation of glucocorticoid receptors, thereafter, leading to hippocampal atrophy in response to chronic stress. […] Particularly compelling evidence for hippocampal involvement in PTSD was found by several meta-analyses reporting a significant reduction in hippocampal volume in PTSD patients as compared to both healthy controls and trauma-exposed individuals without PTSD. […] Norepinephrine and indirect signaling from the limbic system including the hippocampus, mPFC, and amygdala act on the paraventricular nucleus of the hypothalamus to trigger the release of corticotropin-releasing hormone, or CRH.

• #7 Posttraumatic Stress Disorder: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288154-overview

  Posttraumatic stress disorder (PTSD) is a syndrome resulting from exposure to real or threatened serious injury or sexual assault. The signs and symptoms of PTSD appear to arise from complex interactions of psychological and neurobiological factors. Studies have found alterations in the amygdala, prefrontal cortex, hippocampus, and anterior cingulate, and corpus collosum as well as altered functioning of the hypothalamic pituitary axis (HPA). […] In addition to the psychological impact of experiencing a traumatic event, posttraumatic stress disorder (PTSD) frequently leads to changes in the anatomy and neurophysiology of the brain. Reduced size of the hippocampus is probably both a predisposing factor and a result of trauma. The amygdala, which is involved in processing emotions and modulating the fear response, seems to be overly reactive in patients with PTSD. The medial prefrontal cortex (mPFC), which exhibits inhibitory control over the stress response and emotional reactivity of the amygdala, appears to be smaller and less responsive in individuals with PTSD.

• #8 Causes – Post-traumatic stress disorder – NHS

  https://www.nhs.uk/mental-health/conditions/post-traumatic-stress-disorder-ptsd/causes/

  In people with PTSD, parts of the brain involved in emotional processing appear different in brain scans. […] In people with PTSD, the hippocampus appears smaller in size. […] It’s thought that changes in this part of the brain may be related to fear and anxiety, memory problems and flashbacks. […] The malfunctioning hippocampus may prevent flashbacks and nightmares being properly processed, so the anxiety they generate does not reduce over time. […] Treatment of PTSD results in proper processing of the memories so, over time, the flashbacks and nightmares gradually disappear.

• #9 Posttraumatic stress disorder in children and adolescents: Epidemiology, clinical features, assessment, and diagnosis – UpToDate

  https://www.uptodate.com/contents/posttraumatic-stress-disorder-in-children-and-adolescents-epidemiology-clinical-features-assessment-and-diagnosis

  Posttraumatic stress disorder (PTSD) is a debilitating and often chronic mental disorder that develops in some children and adolescents following exposure to a traumatic event. […] The precise pathophysiology of posttraumatic stress disorder (PTSD) is unknown. A predominant learning model of PTSD argues that the disorder reflects a failure to inhibit fear. […] Evidence for this model of PTSD has been observed in behavior and neuroimaging of adults, which reveal disruptions in the structure and function of brain regions involved in fear learning and salience processing including the amygdala, hippocampus, anterior cingulate cortex (ACC), and ventromedial prefrontal cortex (vmPFC). […] PTSD is specifically associated with heightened amygdala activation, reduced activity in the vmPFC and rostral ACC in response to emotional or threatening cues, and elevated activity in the dorsal ACC during fear conditioning, extinction learning recall, and response selection.

• #10 The Pathophysiology of Post-Traumatic Stress Disorder | Encyclopedia MDPI

  https://encyclopedia.pub/entry/50692

  PTSD patients exhibit reduced activity in the medial prefrontal cortex (mPFC) and anterior cingulate cortex (ACC) during presentation of trauma-related and non-related aversive stimuli. […] Further, they have been observed to have decreased volume in the ventromedial prefrontal cortex (vmPFC) and ACC and even to utilize altered pathways from the ACC to the amygdala. […] All these changes in the PFC suggest that amygdala dysregulation may be involved in the pathophysiology of PTSD by erasure of the conventionally strict regulation of fear responses. […] Noradrenaline is a neuromodulatory neurotransmitter system capable of producing a rapid and coordinated response to acute stress. […] A meta-analysis compiling data from 1388 articles along with several other studies found statistically significant increased levels of noradrenaline in PTSD patients compared to controls, indicating the likelihood of increased noradrenergic tone in these individuals.

• #11 Functional changes in neural mechanisms underlying post-traumatic stress disorder in World Trade Center responders | Translational Psychiatry

  https://www.nature.com/articles/s41398-023-02526-y

  Within WTC-PTSD, a dimensional measure of symptom severity was positively associated with EC values in the right anterior parahippocampal gyrus and brainstem. […] Functional neuroimaging can provide effective tools to identify neural correlates of diagnostic and dimensional indicators of PTSD. […] The mechanisms through which PTSD impacts neural functioning are not well established. […] We identified clear differences in functional neuro-profiles of WTC-responders with and without PTSD providing a robust basis for discriminating trauma survivors that did and did not develop PTSD. […] WTC exposure duration (months on site) moderates the association between PTSD and EC values in two of the nine hubs of differential connectivity; the right anterior parahippocampal gyrus and the left amygdala, both previously linked to fear conditioning and to PTSD.

• #12 Functional changes in neural mechanisms underlying post-traumatic stress disorder in World Trade Center responders | Translational Psychiatry

  https://www.nature.com/articles/s41398-023-02526-y

  Within WTC-PTSD, a dimensional measure of symptom severity was positively associated with EC values in the right anterior parahippocampal gyrus and brainstem. […] Functional neuroimaging can provide effective tools to identify neural correlates of diagnostic and dimensional indicators of PTSD. […] The mechanisms through which PTSD impacts neural functioning are not well established. […] We identified clear differences in functional neuro-profiles of WTC-responders with and without PTSD providing a robust basis for discriminating trauma survivors that did and did not develop PTSD. […] WTC exposure duration (months on site) moderates the association between PTSD and EC values in two of the nine hubs of differential connectivity; the right anterior parahippocampal gyrus and the left amygdala, both previously linked to fear conditioning and to PTSD.

• #13 Recent Progress in Understanding the Pathophysiology of Post-Traumatic Stress Disorder

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3629370/

  Post-traumatic stress disorder (PTSD) is a common and chronic anxiety disorder that can result after exposure to a traumatic event. […] Several neurobiological systems have been implicated in the pathophysiology and vulnerability towards developing PTSD after trauma exposure. […] Specifically, we discuss functional aetiologies in the noradrenergic, serotonergic, endogenous cannabinoid and opioid systems as well as the hypothalamic-pituitary adrenal (HPA) axis. […] This paper reviews our current understanding of the pathophysiology underlying PTSD with evidence suggesting functional aetiologies in the noradrenergic, serotonergic, endogenous cannabinoid, and opioid systems as well as the hypothalamic-pituitary adrenal (HPA) axis. […] The noradrenaline transporter (NET) is a potential noradrenaline target for studying the pathophysiology of PTSD and may emerge as a target for treatment development in the future.

• #14 Posttraumatic stress disorder: from diagnosis to prevention | Military Medical Research | Full Text

  https://mmrjournal.biomedcentral.com/articles/10.1186/s40779-018-0179-0

  Posttraumatic stress disorder (PTSD) is a chronic impairment disorder that occurs after exposure to traumatic events. […] Its pathogenesis is multifactorial, including the activation of the hypothalamic-pituitary-adrenal (HPA) axis, immune response, or even genetic discrepancy. The morphological alternation of subcortical brain structures may also correlate with PTSD symptoms. […] The mechanisms leading to posttraumatic stress disorder have not yet been fully elucidated. Recent literature suggests that both the neuroendocrine and immune systems are involved in the formulation and development of PTSD. After traumatic exposures, the stress response pathways of the hypothalamic-pituitary-adrenal (HPA) axis and sympathetic nervous system are activated and lead to the abnormal release of glucocorticoids (GC) and catecholamines.

• #15 Posttraumatic Stress Disorder: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288154-overview

  Alterations in neurohormonal and neurotransmitter functioning have also been found. Individuals with PTSD tend to have normal to low circulating levels of cortisol despite their ongoing stress and elevated levels of Corticotropin Releasing Factor (CRF). Cortisol leads to decreased production of CRF. If cortisol is low then CRF continues to be high and stimulates norepinephrine release by the anterior cingulate cortex. Individuals with PTSD demonstrate hyperactivity of the sympathetic branch of the autonomic nervous system, as evidenced by changes in heart rate, blood pressure, skin conductance level, and other psychophysiological measures. They also have elevated noradrenergic reactivity to pharmacological challenges. A variety of other neurotransmitter systems, such as the serotonin, GABA, glutamate, neuropeptide Y, and endogenous opioids, show altered functioning in individuals with PTSD.

• #16 Post-traumatic stress disorder – Wikipedia

  https://en.wikipedia.org/wiki/Post-traumatic_stress_disorder

  PTSD causes biochemical changes in the brain and body, that differ from other psychiatric disorders such as major depression. Individuals diagnosed with PTSD respond more strongly to a dexamethasone suppression test than individuals diagnosed with clinical depression. […] Most people with PTSD show a low secretion of cortisol and high secretion of catecholamines in urine, with a norepinephrine/cortisol ratio consequently higher than comparable non-diagnosed individuals. This is in contrast to the normative fight-or-flight response, in which both catecholamine and cortisol levels are elevated after exposure to a stressor. […] The maintenance of fear has been shown to include the HPA axis, the locus coeruleus-noradrenergic systems, and the connections between the limbic system and frontal cortex. The HPA axis that coordinates the hormonal response to stress, which activates the LC-noradrenergic system, is implicated in the over-consolidation of memories that occurs in the aftermath of trauma. This over-consolidation increases the likelihood of one’s developing PTSD.

• #17 Post-traumatic stress disorder – Wikipedia

  https://en.wikipedia.org/wiki/Post-traumatic_stress_disorder

  PTSD has been hypothesized to be a maladaptive learning pathway to fear response through a hypersensitive, hyperreactive, and hyperresponsive HPA axis. […] Low cortisol levels may predispose individuals to PTSD: Following war trauma, Swedish soldiers serving in Bosnia and Herzegovina with low pre-service salivary cortisol levels had a higher risk of reacting with PTSD symptoms, following war trauma, than soldiers with normal pre-service levels. […] It is thought that the locus coeruleus-noradrenergic system mediates the over-consolidation of fear memory. High levels of cortisol reduce noradrenergic activity, and because people with PTSD tend to have reduced levels of cortisol, it has been proposed that individuals with PTSD cannot regulate the increased noradrenergic response to traumatic stress.

• #18 Post-traumatic stress disorder – Wikipedia

  https://en.wikipedia.org/wiki/Post-traumatic_stress_disorder

  PTSD causes biochemical changes in the brain and body, that differ from other psychiatric disorders such as major depression. Individuals diagnosed with PTSD respond more strongly to a dexamethasone suppression test than individuals diagnosed with clinical depression. […] Most people with PTSD show a low secretion of cortisol and high secretion of catecholamines in urine, with a norepinephrine/cortisol ratio consequently higher than comparable non-diagnosed individuals. This is in contrast to the normative fight-or-flight response, in which both catecholamine and cortisol levels are elevated after exposure to a stressor. […] The maintenance of fear has been shown to include the HPA axis, the locus coeruleus-noradrenergic systems, and the connections between the limbic system and frontal cortex. The HPA axis that coordinates the hormonal response to stress, which activates the LC-noradrenergic system, is implicated in the over-consolidation of memories that occurs in the aftermath of trauma. This over-consolidation increases the likelihood of one’s developing PTSD.

• #19 Post-traumatic stress disorder – Wikipedia

  https://en.wikipedia.org/wiki/Post-traumatic_stress_disorder

  PTSD causes biochemical changes in the brain and body, that differ from other psychiatric disorders such as major depression. Individuals diagnosed with PTSD respond more strongly to a dexamethasone suppression test than individuals diagnosed with clinical depression. […] Most people with PTSD show a low secretion of cortisol and high secretion of catecholamines in urine, with a norepinephrine/cortisol ratio consequently higher than comparable non-diagnosed individuals. This is in contrast to the normative fight-or-flight response, in which both catecholamine and cortisol levels are elevated after exposure to a stressor. […] The maintenance of fear has been shown to include the HPA axis, the locus coeruleus-noradrenergic systems, and the connections between the limbic system and frontal cortex. The HPA axis that coordinates the hormonal response to stress, which activates the LC-noradrenergic system, is implicated in the over-consolidation of memories that occurs in the aftermath of trauma. This over-consolidation increases the likelihood of one’s developing PTSD.

• #20 Post-traumatic stress disorder – Wikipedia

  https://en.wikipedia.org/wiki/Post-traumatic_stress_disorder

  PTSD causes biochemical changes in the brain and body, that differ from other psychiatric disorders such as major depression. Individuals diagnosed with PTSD respond more strongly to a dexamethasone suppression test than individuals diagnosed with clinical depression. […] Most people with PTSD show a low secretion of cortisol and high secretion of catecholamines in urine, with a norepinephrine/cortisol ratio consequently higher than comparable non-diagnosed individuals. This is in contrast to the normative fight-or-flight response, in which both catecholamine and cortisol levels are elevated after exposure to a stressor. […] The maintenance of fear has been shown to include the HPA axis, the locus coeruleus-noradrenergic systems, and the connections between the limbic system and frontal cortex. The HPA axis that coordinates the hormonal response to stress, which activates the LC-noradrenergic system, is implicated in the over-consolidation of memories that occurs in the aftermath of trauma. This over-consolidation increases the likelihood of one’s developing PTSD.

• #21 Advances in Posttraumatic Stress Disorder (PTSD): A Primer

  https://psychscenehub.com/psychinsights/advances-posttraumatic-stress-disorder-ptsd/

  The diminished cortisol response contributes to persistent adrenergic hyperactivation, as the usual role of cortisol in dampening the adrenergic system is compromised. […] PTSD frequently coexists with immune-related conditions such as asthma, autoimmune diseases, and cardiovascular disorders, possibly due to shared inflammatory pathways. […] The allostatic load model describes how cumulative stress responses contribute to the development and persistence of PTSD. […] Neuroinflammation plays a significant role in PTSD pathophysiology, with activation of neuroimmune cells such as microglia and astrocytes altering the neurobiological environment through the release of inflammatory markers. […] PTSD is associated with hypoactivation of the NAc and PFC during reward processing, linking DAergic dysfunction to impaired decision-making.

• #22 Gene that Helps Form Trauma-Related Memories May Also Help Prevent Post-traumatic Stress Disorder | NYU Langone News

  https://nyulangone.org/news/gene-helps-form-trauma-related-memories-may-also-help-prevent-post-traumatic-stress-disorder

  To further determine if manipulating fkbp5 could prevent the abnormal paths of extinction learning, Galatzer-Levy looked at data taken from a mouse study in which they were fear conditioned, given doses of dexamethasone or a placebo, and then put through fear extinction training the following day. […] Although the change in fkbp5 expression was temporary, the effect of high-dose dexamethasone on extinction learning was permanent, Galatzer-Levy says. […] A treatment like dexamethasone is very appealing because it has very few side effects and is inexpensive, Galatzer-Levy says. It potentially could be an ideal preventative treatment since we know it has effects that alter fear learning and memory.

• #23 Recent Progress in Understanding the Pathophysiology of Post-Traumatic Stress Disorder

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3629370/

  Post-traumatic stress disorder (PTSD) is a common and chronic anxiety disorder that can result after exposure to a traumatic event. […] Several neurobiological systems have been implicated in the pathophysiology and vulnerability towards developing PTSD after trauma exposure. […] Specifically, we discuss functional aetiologies in the noradrenergic, serotonergic, endogenous cannabinoid and opioid systems as well as the hypothalamic-pituitary adrenal (HPA) axis. […] This paper reviews our current understanding of the pathophysiology underlying PTSD with evidence suggesting functional aetiologies in the noradrenergic, serotonergic, endogenous cannabinoid, and opioid systems as well as the hypothalamic-pituitary adrenal (HPA) axis. […] The noradrenaline transporter (NET) is a potential noradrenaline target for studying the pathophysiology of PTSD and may emerge as a target for treatment development in the future.

• #24 Posttraumatic Stress Disorder: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288154-overview

  Alterations in neurohormonal and neurotransmitter functioning have also been found. Individuals with PTSD tend to have normal to low circulating levels of cortisol despite their ongoing stress and elevated levels of Corticotropin Releasing Factor (CRF). Cortisol leads to decreased production of CRF. If cortisol is low then CRF continues to be high and stimulates norepinephrine release by the anterior cingulate cortex. Individuals with PTSD demonstrate hyperactivity of the sympathetic branch of the autonomic nervous system, as evidenced by changes in heart rate, blood pressure, skin conductance level, and other psychophysiological measures. They also have elevated noradrenergic reactivity to pharmacological challenges. A variety of other neurotransmitter systems, such as the serotonin, GABA, glutamate, neuropeptide Y, and endogenous opioids, show altered functioning in individuals with PTSD.

• #25 Posttraumatic Stress Disorder: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288154-overview

  Alterations in neurohormonal and neurotransmitter functioning have also been found. Individuals with PTSD tend to have normal to low circulating levels of cortisol despite their ongoing stress and elevated levels of Corticotropin Releasing Factor (CRF). Cortisol leads to decreased production of CRF. If cortisol is low then CRF continues to be high and stimulates norepinephrine release by the anterior cingulate cortex. Individuals with PTSD demonstrate hyperactivity of the sympathetic branch of the autonomic nervous system, as evidenced by changes in heart rate, blood pressure, skin conductance level, and other psychophysiological measures. They also have elevated noradrenergic reactivity to pharmacological challenges. A variety of other neurotransmitter systems, such as the serotonin, GABA, glutamate, neuropeptide Y, and endogenous opioids, show altered functioning in individuals with PTSD.

• #26 The Pathophysiology of Post-Traumatic Stress Disorder | Encyclopedia MDPI

  https://encyclopedia.pub/entry/50692

  Based on these findings, Pietrzak and colleagues conducted a follow-up study to determine whether a reduction in the Norepinephrine Transporter (NET) could be responsible for the increased noradrenergic tone in PTSD patients. […] The researchers found evidence for a significant reduction in the density of NET labeled in the LC in PTSD patients compared to controls. […] As previously mentioned, changes in the PFC found in PTSD patients have downstream impacts on the amygdala. […] Specifically, it has been found that the amygdala in those with PTSD is hyperactive during exposure to trauma-linked events. […] A lack of proper control of the amygdala provides a possible explanation as to why PTSD patients experience intrusive memories from prior trauma. […] Although the results were similar for both trauma-exposed individuals and PTSD patients, meta-analyses observed statistically significant differences between these two groups and healthy controls.

• #27 Recent Progress in Understanding the Pathophysiology of Post-Traumatic Stress Disorder

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3629370/

  The 5-HT1A and 5-HT1B receptors have been identified in the study of stress disorders and could provide new clinical understanding of PTSD phenotypes. […] The CB1 receptors are of particular interest as recent studies demonstrate a specific and primary role for the CB1 receptor in mediating the neurobiological underpinnings and behavioural consequences of stress exposure. […] Given the overwhelming evidence that the eCBs and their attending receptors play a key role in the aetiology of PTSD, pharmacological interventions specifically designed to target eCB signalling could emerge as a novel, potentially breakthrough treatment for PTSD. […] A dysfunctional HPA axis is associated with numerous psychosomatic and psychiatric disorders. […] PTSD patients exhibit increased cerebrospinal fluid levels of CRF and abnormalities in other HPA axis systems, indicating the utility of compounds that dampen the CRF system or other HPA axis hormones in the treatment of PTSD. […] Multiple lines of evidence connect opioid systems in the pathophysiology of PTSD. […] The implications of these lines of evidence are that the -OR system could emerge as a system of interest for targeted evidence-based treatment development for this patient population.

• #28 Posttraumatic Stress Disorder – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK559129/

  Neuroanatomically, the amygdala has significant responsibility for threat detection and fear response. […] In patients with PTSD, the toning down capacity of the frontal lobe is dysregulated compared to those without PTSD. This observation may partially explain the imaging findings of reduced brain volume in those individuals with chronic PTSD. […] Neurotransmitter levels have been investigated in those with PTSD, including serotonin, dopamine, epinephrine, norepinephrine, glutamate, and gamma-aminobutyric acid (GABA). Neurotransmitter levels in patients with PTSD have had inconsistent findings but still form the basis of an approach for treatment with psychotropic medications.

• #29 Recent Progress in Understanding the Pathophysiology of Post-Traumatic Stress Disorder

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3629370/

  The 5-HT1A and 5-HT1B receptors have been identified in the study of stress disorders and could provide new clinical understanding of PTSD phenotypes. […] The CB1 receptors are of particular interest as recent studies demonstrate a specific and primary role for the CB1 receptor in mediating the neurobiological underpinnings and behavioural consequences of stress exposure. […] Given the overwhelming evidence that the eCBs and their attending receptors play a key role in the aetiology of PTSD, pharmacological interventions specifically designed to target eCB signalling could emerge as a novel, potentially breakthrough treatment for PTSD. […] A dysfunctional HPA axis is associated with numerous psychosomatic and psychiatric disorders. […] PTSD patients exhibit increased cerebrospinal fluid levels of CRF and abnormalities in other HPA axis systems, indicating the utility of compounds that dampen the CRF system or other HPA axis hormones in the treatment of PTSD. […] Multiple lines of evidence connect opioid systems in the pathophysiology of PTSD. […] The implications of these lines of evidence are that the -OR system could emerge as a system of interest for targeted evidence-based treatment development for this patient population.

• #30 Recent Progress in Understanding the Pathophysiology of Post-Traumatic Stress Disorder

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3629370/

  The 5-HT1A and 5-HT1B receptors have been identified in the study of stress disorders and could provide new clinical understanding of PTSD phenotypes. […] The CB1 receptors are of particular interest as recent studies demonstrate a specific and primary role for the CB1 receptor in mediating the neurobiological underpinnings and behavioural consequences of stress exposure. […] Given the overwhelming evidence that the eCBs and their attending receptors play a key role in the aetiology of PTSD, pharmacological interventions specifically designed to target eCB signalling could emerge as a novel, potentially breakthrough treatment for PTSD. […] A dysfunctional HPA axis is associated with numerous psychosomatic and psychiatric disorders. […] PTSD patients exhibit increased cerebrospinal fluid levels of CRF and abnormalities in other HPA axis systems, indicating the utility of compounds that dampen the CRF system or other HPA axis hormones in the treatment of PTSD. […] Multiple lines of evidence connect opioid systems in the pathophysiology of PTSD. […] The implications of these lines of evidence are that the -OR system could emerge as a system of interest for targeted evidence-based treatment development for this patient population.

• #31 Recent Progress in Understanding the Pathophysiology of Post-Traumatic Stress Disorder

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3629370/

  The 5-HT1A and 5-HT1B receptors have been identified in the study of stress disorders and could provide new clinical understanding of PTSD phenotypes. […] The CB1 receptors are of particular interest as recent studies demonstrate a specific and primary role for the CB1 receptor in mediating the neurobiological underpinnings and behavioural consequences of stress exposure. […] Given the overwhelming evidence that the eCBs and their attending receptors play a key role in the aetiology of PTSD, pharmacological interventions specifically designed to target eCB signalling could emerge as a novel, potentially breakthrough treatment for PTSD. […] A dysfunctional HPA axis is associated with numerous psychosomatic and psychiatric disorders. […] PTSD patients exhibit increased cerebrospinal fluid levels of CRF and abnormalities in other HPA axis systems, indicating the utility of compounds that dampen the CRF system or other HPA axis hormones in the treatment of PTSD. […] Multiple lines of evidence connect opioid systems in the pathophysiology of PTSD. […] The implications of these lines of evidence are that the -OR system could emerge as a system of interest for targeted evidence-based treatment development for this patient population.

• #32 Recent Progress in Understanding the Pathophysiology of Post-Traumatic Stress Disorder

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3629370/

  The 5-HT1A and 5-HT1B receptors have been identified in the study of stress disorders and could provide new clinical understanding of PTSD phenotypes. […] The CB1 receptors are of particular interest as recent studies demonstrate a specific and primary role for the CB1 receptor in mediating the neurobiological underpinnings and behavioural consequences of stress exposure. […] Given the overwhelming evidence that the eCBs and their attending receptors play a key role in the aetiology of PTSD, pharmacological interventions specifically designed to target eCB signalling could emerge as a novel, potentially breakthrough treatment for PTSD. […] A dysfunctional HPA axis is associated with numerous psychosomatic and psychiatric disorders. […] PTSD patients exhibit increased cerebrospinal fluid levels of CRF and abnormalities in other HPA axis systems, indicating the utility of compounds that dampen the CRF system or other HPA axis hormones in the treatment of PTSD. […] Multiple lines of evidence connect opioid systems in the pathophysiology of PTSD. […] The implications of these lines of evidence are that the -OR system could emerge as a system of interest for targeted evidence-based treatment development for this patient population.

• #33 Posttraumatic Stress Disorder: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288154-overview

  Alterations in neurohormonal and neurotransmitter functioning have also been found. Individuals with PTSD tend to have normal to low circulating levels of cortisol despite their ongoing stress and elevated levels of Corticotropin Releasing Factor (CRF). Cortisol leads to decreased production of CRF. If cortisol is low then CRF continues to be high and stimulates norepinephrine release by the anterior cingulate cortex. Individuals with PTSD demonstrate hyperactivity of the sympathetic branch of the autonomic nervous system, as evidenced by changes in heart rate, blood pressure, skin conductance level, and other psychophysiological measures. They also have elevated noradrenergic reactivity to pharmacological challenges. A variety of other neurotransmitter systems, such as the serotonin, GABA, glutamate, neuropeptide Y, and endogenous opioids, show altered functioning in individuals with PTSD.

• #34 Advances in Posttraumatic Stress Disorder (PTSD): A Primer

  https://psychscenehub.com/psychinsights/advances-posttraumatic-stress-disorder-ptsd/

  The diminished cortisol response contributes to persistent adrenergic hyperactivation, as the usual role of cortisol in dampening the adrenergic system is compromised. […] PTSD frequently coexists with immune-related conditions such as asthma, autoimmune diseases, and cardiovascular disorders, possibly due to shared inflammatory pathways. […] The allostatic load model describes how cumulative stress responses contribute to the development and persistence of PTSD. […] Neuroinflammation plays a significant role in PTSD pathophysiology, with activation of neuroimmune cells such as microglia and astrocytes altering the neurobiological environment through the release of inflammatory markers. […] PTSD is associated with hypoactivation of the NAc and PFC during reward processing, linking DAergic dysfunction to impaired decision-making.

• #35 Neurophysiology and Psychopathology Underlying PTSD and Recent Insights into the PTSD Therapies—A Comprehensive Review

  https://www.mdpi.com/2077-0383/9/9/2951

  It remains unclear why combat veterans with PTSD are more resistant to treatment modalities than the other PTSD types. […] The clinical efficacy of these antidepressants including fluoxetine is associated with their immunomodulatory properties. […] The modulation of energy metabolism is correlated with alleviation of PTSD symptomatology as noted above. […] Thus, the p11 protein plays a significant role in mood regulation during PTSD, and it is essential to develop novel therapeutic modalities to modulate the function of p11 in PTSD patients comorbid with major depressive disorder.

• #36 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  Posttraumatic stress disorder (PTSD) develops in a subset of individuals upon exposure to traumatic stress. In addition to well-defined psychological and behavioral symptoms, some individuals with PTSD also exhibit elevated concentrations of inflammatory markers, including C-reactive protein, interleukin-6, and tumor necrosis factor-. […] Numerous factors, including lifetime trauma burden, biological sex, genetic background, metabolic conditions, and gut microbiota, may contribute to inflammation in PTSD. Importantly, inflammation can influence neural circuits and neurotransmitter signaling in regions of the brain relevant to fear, anxiety, and emotion regulation. […] Given the link between PTSD and the immune system, current studies are underway to evaluate the efficacy of anti-inflammatory treatments in those with PTSD. Understanding the complex interactions between PTSD and the immune system is essential for future discovery of diagnostic and therapeutic tools.

• #37 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  The neuroendocrine, psychophysiological, and neurobiological changes in PTSD etiology and outcome have been extensively studied. Growing evidence in the past two decades points to mechanisms related to the innate (i.e., non-specific first line of defense regulated by innate immune cells, including monocytes, macrophages, dendritic cells, and microglia) and adaptive (i.e., antigen-specific immunity regulated by T and B lymphocytes) immune systems in the pathophysiology of PTSD. […] The initial evidence for the relationship between PTSD and the immune system comes from individual studies and subsequent meta-analyses reporting alterations in peripheral inflammatory markers, such as C-reactive protein (CRP), interferon-gamma (IFN-), interleukin-6 (IL-6), interleukin-10 (IL-10), and tumor necrosis factor-alpha (TNF-) in individuals with PTSD.

• #38 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  The inflammatory environment in PTSD is characterized by increased levels of pro-inflammatory markers (e.g., CRP, IL-6, IL-1, IL-2, TNF-, IFN-) and decreased levels of anti-inflammatory markers (e.g., IL-10). Elevated inflammatory markers in PTSD may create a positive feedback loop to promote inflammation, such that IL-6, IL-1, and TNF- induce CRP to activate the complement system, which triggers a cascade of events to promote inflammation. […] Nonetheless, it is still not clear whether the inflammatory milieu is the outcome of PTSD, or if pre-existing or trauma-induced inflammation increases the risk of PTSD. Notably, a bidirectional relationship between PTSD and inflammation is supported by recent reports, including a large-scale genetic study reporting a bidirectional genetic association between PTSD and CRP.

• #39 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  The inflammatory environment in PTSD is characterized by increased levels of pro-inflammatory markers (e.g., CRP, IL-6, IL-1, IL-2, TNF-, IFN-) and decreased levels of anti-inflammatory markers (e.g., IL-10). Elevated inflammatory markers in PTSD may create a positive feedback loop to promote inflammation, such that IL-6, IL-1, and TNF- induce CRP to activate the complement system, which triggers a cascade of events to promote inflammation. […] Nonetheless, it is still not clear whether the inflammatory milieu is the outcome of PTSD, or if pre-existing or trauma-induced inflammation increases the risk of PTSD. Notably, a bidirectional relationship between PTSD and inflammation is supported by recent reports, including a large-scale genetic study reporting a bidirectional genetic association between PTSD and CRP.

• #40 Advances in Posttraumatic Stress Disorder (PTSD): A Primer

  https://psychscenehub.com/psychinsights/advances-posttraumatic-stress-disorder-ptsd/

  The diminished cortisol response contributes to persistent adrenergic hyperactivation, as the usual role of cortisol in dampening the adrenergic system is compromised. […] PTSD frequently coexists with immune-related conditions such as asthma, autoimmune diseases, and cardiovascular disorders, possibly due to shared inflammatory pathways. […] The allostatic load model describes how cumulative stress responses contribute to the development and persistence of PTSD. […] Neuroinflammation plays a significant role in PTSD pathophysiology, with activation of neuroimmune cells such as microglia and astrocytes altering the neurobiological environment through the release of inflammatory markers. […] PTSD is associated with hypoactivation of the NAc and PFC during reward processing, linking DAergic dysfunction to impaired decision-making.

• #41 Advances in Posttraumatic Stress Disorder (PTSD): A Primer

  https://psychscenehub.com/psychinsights/advances-posttraumatic-stress-disorder-ptsd/

  The neurobiology of PTSD is complex and involves neuroendocrine, neurochemical and neuroanatomical changes in neural networks. […] The amygdala, hippocampus, and mPFC form the core network for fear conditioning, involving acquisition, consolidation, and extinction of fear responses. […] In PTSD, amygdala hyperactivity persists due to inadequate inhibition from the mPFC, resulting in heightened responses to conditioned stimuli. […] The hippocampus is crucial for encoding fear memories, contextual processing, and regulating amygdala activation. […] In PTSD, decreased mPFC activity and compromised integrity of the uncinate fasciculus impair this regulatory function, contributing to the persistence of fear and avoidance behaviours. […] The neuroendocrine profile in PTSD suggests that treatments targeting glucocorticoid signalling may offer therapeutic benefits.

• #42 Advances in Posttraumatic Stress Disorder (PTSD): A Primer

  https://psychscenehub.com/psychinsights/advances-posttraumatic-stress-disorder-ptsd/

  The diminished cortisol response contributes to persistent adrenergic hyperactivation, as the usual role of cortisol in dampening the adrenergic system is compromised. […] PTSD frequently coexists with immune-related conditions such as asthma, autoimmune diseases, and cardiovascular disorders, possibly due to shared inflammatory pathways. […] The allostatic load model describes how cumulative stress responses contribute to the development and persistence of PTSD. […] Neuroinflammation plays a significant role in PTSD pathophysiology, with activation of neuroimmune cells such as microglia and astrocytes altering the neurobiological environment through the release of inflammatory markers. […] PTSD is associated with hypoactivation of the NAc and PFC during reward processing, linking DAergic dysfunction to impaired decision-making.

• #43 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  The relationship between inflammation and traumatic experiences is also supported by animal repeated social defeat stress (RSDS) models. […] Following RSDS, anxiety-like behaviors are associated with increased levels of peripheral cytokines, including IL-2, IL-10, IL-17A, IL-22, and TNF. […] The inflammatory environment in PTSD may also be exacerbated by co-morbid metabolic conditions. Individuals with PTSD are most likely to suffer from type 2 diabetes mellitus, metabolic syndrome (MetS), and its individual components, including obesity, insulin resistance, and dyslipidemia. […] In both MetS and PTSD, the noradrenergic system is activated to trigger an innate immune response. Like PTSD, MetS and obesity are also characterized by an increase in proinflammatory markers, such as CRP, IL-6, and TNF-.

• #44 Posttraumatic Stress Disorder: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288154-overview

  Further insight into the pathophysiology of PTSD may be found in the Dual Representational Theory. This understanding highlights the presence of two separate systems for memory. Verbally accessible memory (first recorded in the hippocampus and later in general brain memory storage) is able to be modified by reflection. This is characteristic of most non-traumatic memories. Situationally accessible memory, on the other hand, is non-verbal and associated with very strong emotions and the amygdala. Traumatic memories tend to be stored as situationally accessible memories, which are harder to process, are readily triggered by associations, and more likely to cause emotional distress when activated. Individuals may struggle to integrate these traumatic experiences with the rest of their life narrative thereby resulting in the traumatic memory having a significant impact on their views of the world and themselves.

• #45 Posttraumatic Stress Disorder: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288154-overview

  Further insight into the pathophysiology of PTSD may be found in the Dual Representational Theory. This understanding highlights the presence of two separate systems for memory. Verbally accessible memory (first recorded in the hippocampus and later in general brain memory storage) is able to be modified by reflection. This is characteristic of most non-traumatic memories. Situationally accessible memory, on the other hand, is non-verbal and associated with very strong emotions and the amygdala. Traumatic memories tend to be stored as situationally accessible memories, which are harder to process, are readily triggered by associations, and more likely to cause emotional distress when activated. Individuals may struggle to integrate these traumatic experiences with the rest of their life narrative thereby resulting in the traumatic memory having a significant impact on their views of the world and themselves.

• #46 Causes – Post-traumatic stress disorder – NHS

  https://www.nhs.uk/mental-health/conditions/post-traumatic-stress-disorder-ptsd/causes/

  In people with PTSD, parts of the brain involved in emotional processing appear different in brain scans. […] In people with PTSD, the hippocampus appears smaller in size. […] It’s thought that changes in this part of the brain may be related to fear and anxiety, memory problems and flashbacks. […] The malfunctioning hippocampus may prevent flashbacks and nightmares being properly processed, so the anxiety they generate does not reduce over time. […] Treatment of PTSD results in proper processing of the memories so, over time, the flashbacks and nightmares gradually disappear.

• #47 Posttraumatic stress disorder: from diagnosis to prevention | Military Medical Research | Full Text

  https://mmrjournal.biomedcentral.com/articles/10.1186/s40779-018-0179-0

  A recent meta-analysis of 20 studies found increased plasma levels of proinflammatory cytokines tumor necrosis factor-alpha (TNF-a), interleukin-1beta (IL-1b), and interleukin-6 (IL-6) in individuals with PTSD compared to healthy controls. […] Evidence indicates that the development of PTSD is also affected by genetic factors. Research has found that genetic and epigenetic factors account for up to 70% of the individual differences in PTSD development, with PTSD heritability estimated at 30%. […] It is generally acknowledged that some mental diseases, such as major depressive disorder (MDD), bipolar disorder, and schizophrenia, are associated with massive subcortical volume change. Recently, numerous studies have examined the relationship between the morphology changes of subcortical structures and PTSD. […] Overall, rigorous and longitudinal research using new technologies, such as magnetoencephalography, functional MRI, and susceptibility-weighted imaging, are needed for further investigation and identification of morphological changes in the brain after a traumatic exposure.

• #48 Posttraumatic stress disorder: from diagnosis to prevention | Military Medical Research | Full Text

  https://mmrjournal.biomedcentral.com/articles/10.1186/s40779-018-0179-0

  A recent meta-analysis of 20 studies found increased plasma levels of proinflammatory cytokines tumor necrosis factor-alpha (TNF-a), interleukin-1beta (IL-1b), and interleukin-6 (IL-6) in individuals with PTSD compared to healthy controls. […] Evidence indicates that the development of PTSD is also affected by genetic factors. Research has found that genetic and epigenetic factors account for up to 70% of the individual differences in PTSD development, with PTSD heritability estimated at 30%. […] It is generally acknowledged that some mental diseases, such as major depressive disorder (MDD), bipolar disorder, and schizophrenia, are associated with massive subcortical volume change. Recently, numerous studies have examined the relationship between the morphology changes of subcortical structures and PTSD. […] Overall, rigorous and longitudinal research using new technologies, such as magnetoencephalography, functional MRI, and susceptibility-weighted imaging, are needed for further investigation and identification of morphological changes in the brain after a traumatic exposure.

• #49 Neurophysiology and Psychopathology Underlying PTSD and Recent Insights into the PTSD Therapies—A Comprehensive Review

  https://www.mdpi.com/2077-0383/9/9/2951

  Post-traumatic stress disorder (PTSD) is a well-known psychiatric disorder that affects millions of people worldwide. […] However, it remains unclear whether there are concurrent changes in psychopathological and neurophysiological factors associated with PTSD patients. […] This review has extensively discussed the single nucleotide polymorphism (SNPs) of genetic factors to cause PTSD, the implications of inflammation, neurotransmitter genomics, metabolic alterations, neuroendocrine disturbance (hypothalamus-pituitary-adrenal (HPA) axis), mitochondrial dynamics, neurogenesis, and premature aging related to PTSD-induced psychopathology and neurophysiology. […] Neurophysiological abnormalities are associated with imbalance in the functional aspects of hypothalamus-pituitary-adrenal (HPA) axis, altered immune, neurotransmitter, and neurotropic functions, increased thyroid activity, high nervous system sensitization, accelerated aging processes due to increased DNA damage, and telomere shortening.

• #50 Gene that Helps Form Trauma-Related Memories May Also Help Prevent Post-traumatic Stress Disorder | NYU Langone News

  https://nyulangone.org/news/gene-helps-form-trauma-related-memories-may-also-help-prevent-post-traumatic-stress-disorder

  A specific gene that helps form memories from traumatic events can be manipulated and in doing so may actually help prevent post-traumatic stress disorder (PTSD), according to a new study led by NYU Langone Medical Center and recently published in Neuropharmacology. […] The new study, in collaboration with Harvard Medical School, Emory University School of Medicine, and other organizations, examined fear extinction patterns in mice and humans. […] The interaction between fkbp5 and dexamethasone could enable us to enhance fear extinction, says Isaac Galatzer-Levy, PhD, an assistant professor in the Department of Psychiatry at NYU Langone and its Steven and Alexandra Cohen Veterans Center, and the lead investigator on the study. […] In humans, Galatzer-Levy found that different versions of the fkbp5 gene were able to predict specific differences in extinction learning related to PTSD symptoms such as reliving or re-experiencing the traumatic event; avoiding reminders of the event; and, in particular, hyperarousal, or the inability to sleep or concentrate.

• #51 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  Gut microbiota plays an important role in the communication between the brain and the gastrointestinal tract, called the gut-brain axis. […] Growing evidence implicates dysregulated gut-brain axis signaling in the pathogenesis of stress and mood disorders and reports gut microbiome alterations in individuals with PTSD. […] The key factor underlying the sex-specific immune response in PTSD may be estrogen, as studies showed that lower estrogen levels are associated with increased PTSD symptoms. […] A recent study showed the indirect effect of sex on non-remitting PTSD development through pro-inflammatory cytokines. […] Taken together, studies collectively suggest that trauma may lead to HPA axis and SNS activation that increases proinflammatory cytokine production and subsequent neurotransmitter signaling that increases the risk of fear and anxiety symptomatology. Ultimately, this cascade may contribute to the risk of PTSD onset.

• #52 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  Gut microbiota plays an important role in the communication between the brain and the gastrointestinal tract, called the gut-brain axis. […] Growing evidence implicates dysregulated gut-brain axis signaling in the pathogenesis of stress and mood disorders and reports gut microbiome alterations in individuals with PTSD. […] The key factor underlying the sex-specific immune response in PTSD may be estrogen, as studies showed that lower estrogen levels are associated with increased PTSD symptoms. […] A recent study showed the indirect effect of sex on non-remitting PTSD development through pro-inflammatory cytokines. […] Taken together, studies collectively suggest that trauma may lead to HPA axis and SNS activation that increases proinflammatory cytokine production and subsequent neurotransmitter signaling that increases the risk of fear and anxiety symptomatology. Ultimately, this cascade may contribute to the risk of PTSD onset.

• #53 Federal Framework on Posttraumatic Stress Disorder: Recognition, collaboration and support – Canada.ca

  https://www.canada.ca/en/public-health/services/publications/healthy-living/federal-framework-post-traumatic-stress-disorder.html

  Following exposure to a potentially traumatic event, many people experience distressing symptoms such as poor sleep, nightmares, and increased anxiety. However, the majority will recover from these symptoms spontaneously. […] PTSD appears to be twice as common in women as in men. […] PTSD rates among serving military personnel and Veterans increase proportionately to their exposure to traumatic and disturbing events such as participating in combat roles, and events that transgress deeply held moral and ethical standards. […] The prevalence of PTSD in Regular Force Veterans released from service during 1998-2012 and surveyed in 2013 was 13.1%. […] Public safety personnel may be at increased risk of PTSD because their jobs routinely expose them to a range of traumatic events. […] PTSD rates among health care providers are higher than in the general population.

• #54 Federal Framework on Posttraumatic Stress Disorder: Recognition, collaboration and support – Canada.ca

  https://www.canada.ca/en/public-health/services/publications/healthy-living/federal-framework-post-traumatic-stress-disorder.html

  Following exposure to a potentially traumatic event, many people experience distressing symptoms such as poor sleep, nightmares, and increased anxiety. However, the majority will recover from these symptoms spontaneously. […] PTSD appears to be twice as common in women as in men. […] PTSD rates among serving military personnel and Veterans increase proportionately to their exposure to traumatic and disturbing events such as participating in combat roles, and events that transgress deeply held moral and ethical standards. […] The prevalence of PTSD in Regular Force Veterans released from service during 1998-2012 and surveyed in 2013 was 13.1%. […] Public safety personnel may be at increased risk of PTSD because their jobs routinely expose them to a range of traumatic events. […] PTSD rates among health care providers are higher than in the general population.

• #55 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  Gut microbiota plays an important role in the communication between the brain and the gastrointestinal tract, called the gut-brain axis. […] Growing evidence implicates dysregulated gut-brain axis signaling in the pathogenesis of stress and mood disorders and reports gut microbiome alterations in individuals with PTSD. […] The key factor underlying the sex-specific immune response in PTSD may be estrogen, as studies showed that lower estrogen levels are associated with increased PTSD symptoms. […] A recent study showed the indirect effect of sex on non-remitting PTSD development through pro-inflammatory cytokines. […] Taken together, studies collectively suggest that trauma may lead to HPA axis and SNS activation that increases proinflammatory cytokine production and subsequent neurotransmitter signaling that increases the risk of fear and anxiety symptomatology. Ultimately, this cascade may contribute to the risk of PTSD onset.

• #56 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  Gut microbiota plays an important role in the communication between the brain and the gastrointestinal tract, called the gut-brain axis. […] Growing evidence implicates dysregulated gut-brain axis signaling in the pathogenesis of stress and mood disorders and reports gut microbiome alterations in individuals with PTSD. […] The key factor underlying the sex-specific immune response in PTSD may be estrogen, as studies showed that lower estrogen levels are associated with increased PTSD symptoms. […] A recent study showed the indirect effect of sex on non-remitting PTSD development through pro-inflammatory cytokines. […] Taken together, studies collectively suggest that trauma may lead to HPA axis and SNS activation that increases proinflammatory cytokine production and subsequent neurotransmitter signaling that increases the risk of fear and anxiety symptomatology. Ultimately, this cascade may contribute to the risk of PTSD onset.

• #57 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  The relationship between inflammation and traumatic experiences is also supported by animal repeated social defeat stress (RSDS) models. […] Following RSDS, anxiety-like behaviors are associated with increased levels of peripheral cytokines, including IL-2, IL-10, IL-17A, IL-22, and TNF. […] The inflammatory environment in PTSD may also be exacerbated by co-morbid metabolic conditions. Individuals with PTSD are most likely to suffer from type 2 diabetes mellitus, metabolic syndrome (MetS), and its individual components, including obesity, insulin resistance, and dyslipidemia. […] In both MetS and PTSD, the noradrenergic system is activated to trigger an innate immune response. Like PTSD, MetS and obesity are also characterized by an increase in proinflammatory markers, such as CRP, IL-6, and TNF-.

• #58 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  The relationship between inflammation and traumatic experiences is also supported by animal repeated social defeat stress (RSDS) models. […] Following RSDS, anxiety-like behaviors are associated with increased levels of peripheral cytokines, including IL-2, IL-10, IL-17A, IL-22, and TNF. […] The inflammatory environment in PTSD may also be exacerbated by co-morbid metabolic conditions. Individuals with PTSD are most likely to suffer from type 2 diabetes mellitus, metabolic syndrome (MetS), and its individual components, including obesity, insulin resistance, and dyslipidemia. […] In both MetS and PTSD, the noradrenergic system is activated to trigger an innate immune response. Like PTSD, MetS and obesity are also characterized by an increase in proinflammatory markers, such as CRP, IL-6, and TNF-.

• #59 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  The relationship between inflammation and traumatic experiences is also supported by animal repeated social defeat stress (RSDS) models. […] Following RSDS, anxiety-like behaviors are associated with increased levels of peripheral cytokines, including IL-2, IL-10, IL-17A, IL-22, and TNF. […] The inflammatory environment in PTSD may also be exacerbated by co-morbid metabolic conditions. Individuals with PTSD are most likely to suffer from type 2 diabetes mellitus, metabolic syndrome (MetS), and its individual components, including obesity, insulin resistance, and dyslipidemia. […] In both MetS and PTSD, the noradrenergic system is activated to trigger an innate immune response. Like PTSD, MetS and obesity are also characterized by an increase in proinflammatory markers, such as CRP, IL-6, and TNF-.

• #60 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  The relationship between inflammation and traumatic experiences is also supported by animal repeated social defeat stress (RSDS) models. […] Following RSDS, anxiety-like behaviors are associated with increased levels of peripheral cytokines, including IL-2, IL-10, IL-17A, IL-22, and TNF. […] The inflammatory environment in PTSD may also be exacerbated by co-morbid metabolic conditions. Individuals with PTSD are most likely to suffer from type 2 diabetes mellitus, metabolic syndrome (MetS), and its individual components, including obesity, insulin resistance, and dyslipidemia. […] In both MetS and PTSD, the noradrenergic system is activated to trigger an innate immune response. Like PTSD, MetS and obesity are also characterized by an increase in proinflammatory markers, such as CRP, IL-6, and TNF-.

• #61 Neurophysiology and Psychopathology Underlying PTSD and Recent Insights into the PTSD Therapies—A Comprehensive Review

  https://www.mdpi.com/2077-0383/9/9/2951

  Clinicians should seek the most accurate diagnostic approaches to choose suitable PTSD-targeted therapeutic options. […] Neuroimaging studies of PTSD patients revealed hyperactivity of limbic and medial brain pathways in generating an exaggerated response to even low-level social threat signals that, in turn, may be a major factor in emotional recognition and mentalization. […] The development of effective diagnostic and therapeutic interventions to treat PTSD is challenging because of the intricate psychopathology and diverse neurophysiological alterations reported in patients. […] PTSD-induced trauma, chronicity induced from the specific of PTSD, gender and patient’s exposure to the traumatic events, and age factors are important other factors in choosing a specific treatment modality.

• #62 Neurophysiology and Psychopathology Underlying PTSD and Recent Insights into the PTSD Therapies—A Comprehensive Review

  https://www.mdpi.com/2077-0383/9/9/2951

  The psychopathology and pathophysiology of PTSD are associated with deep-seated feelings or memories of the traumatic event that remain vivid. […] A smaller hippocampus in PTSD patients may be a cause for the development of stronger perceptions of fear and acquisition of avoidance feelings related to auditory cues paired with shock. […] Several pathophysiological changes have been reported in PTSD patients and these changes are reported to be overlapped with the clinical manifestations observed in traumatic brain injury (TBI) patients. […] The underlying networks from these brain regions with parahippocampal gyri and visual processing stream are reported to be involved in processing traumatic information and recalling traumatic memories. […] Brain scanning using single-photon emission computerized tomography (SPECT) may contribute to diagnosis of PTSD with high accuracy compared to other MRI and CT scans, which often obtain normal results from PTSD patients.

• #63 The Pathophysiology of Post-Traumatic Stress Disorder | Encyclopedia MDPI

  https://encyclopedia.pub/entry/50692

  The HPA axis which is initiated by CRH release is the single most critical hormonal facilitator of stress response in humans. […] Despite substantial evidence implicating CRH in high-stress states and PTSD symptoms, results from other studies complicate the matter. […] Several studies have also looked downstream of CRH to determine whether cortisol is involved in the development of PTSD. […] It has been found that lower concentrations of hair cortisol in military veterans prior to overseas deployment was positively correlated with PTSD symptoms post deployment. […] Together, these findings seem to indicate that lower cortisol concentrations predict PTSD symptoms following exposure to trauma. […] However, a meta-analysis demonstrated that heart rate was the only biological measure obtained post trauma that could predict PTSD. […] It is evident that more research is needed to clarify the relationship between the HPA axis and PTSD.

• #64 Neurophysiology and Psychopathology Underlying PTSD and Recent Insights into the PTSD Therapies—A Comprehensive Review

  https://www.mdpi.com/2077-0383/9/9/2951

  Clinicians should seek the most accurate diagnostic approaches to choose suitable PTSD-targeted therapeutic options. […] Neuroimaging studies of PTSD patients revealed hyperactivity of limbic and medial brain pathways in generating an exaggerated response to even low-level social threat signals that, in turn, may be a major factor in emotional recognition and mentalization. […] The development of effective diagnostic and therapeutic interventions to treat PTSD is challenging because of the intricate psychopathology and diverse neurophysiological alterations reported in patients. […] PTSD-induced trauma, chronicity induced from the specific of PTSD, gender and patient’s exposure to the traumatic events, and age factors are important other factors in choosing a specific treatment modality.

• #65 Psychological Treatments and Pharmacological Treatments for Adults with Post-traumatic Stress Disorder (PTSD) | Effective Health Care (EHC) Program

  https://effectivehealthcare.ahrq.gov/products/ptsd-adult-treatment/research-protocol

  Posttraumatic stress disorder (PTSD) may develop following exposure to a traumatic event. […] According to a 2008 Institute of Medicine (IOM) report on the treatment of PTSD, the condition develops in a significant minority (up to a third) of individuals who are exposed to extreme stressors, and symptoms of PTSD almost always emerge within days of the trauma. […] PTSD is also highly comorbid with other psychiatric disorders; data from epidemiologic studies have found that a vast majority of individuals with PTSD have another psychiatric disorder, mostly notably substance use disorders and major depressive disorder. […] Treatments available for PTSD span a variety of psychological and pharmacological domains. […] While there is no clearly defined preferred approach to manage PTSD, each of these guidelines supports the use of trauma-focused psychological interventions for adults with PTSD, and all recognize at least some benefit of pharmacologic treatments for PTSD.

• #66 Experts – What Is Post-Traumatic Stress Disorder? | The Soldier’s Heart | FRONTLINE | PBS

  https://www.pbs.org/wgbh/pages/frontline/shows/heart/themes/ptsd.html

  The most unique manifestation of an intrusive recollection is what we call the PTSD flashback: For a brief or extended period, the person with PTSD believes that he or she is back in the traumatic episode. […] And that brings us to the last two intrusive recollection symptoms, and that is that events or situations that are reminiscent of the traumatic event can evoke thoughts of the trauma or can evoke physiological changes such as increased pulse rate or increased heart rate, or changes in the way the brain is processing information. […] Where this becomes really important treatment-wise is that the most powerful treatments that have been developed for treatment of PTSD — and they’re even more powerful than medication treatments — are what we call cognitive behavioral treatments. […] The second cluster are what we call the avoidant numbing symptoms.

• #67 Psychological Treatments and Pharmacological Treatments for Adults with Post-traumatic Stress Disorder (PTSD) | Effective Health Care (EHC) Program

  https://effectivehealthcare.ahrq.gov/products/ptsd-adult-treatment/research-protocol

  Specific psychological interventions that have been studied for the treatment of PTSD are described below and include the following: cognitive-behavioral therapy such as cognitive restructuring, cognitive processing therapy, exposure-based therapies, and coping skills therapy (including stress inoculation therapy); psychodynamic therapy; eye movement desensitization and reprocessing (EMDR); interpersonal therapy; group therapy; hypnosis/hypnotherapy; eclectic psychotherapy; and brainwave neurofeedback. […] Pharmacotherapies, including selective serotonin reuptake inhibitors (SSRIs), serotonin and norepinephrine reuptake inhibitors, tricyclic antidepressants, monoamine oxidase inhibitors, other second-generation antidepressants, atypical antipsychotics, anticonvulsants/mood stabilizers, adrenergic agents, benzodiazepines, and other treatments such as naltrexone, cycloserine, and inositol have also been used to treat PTSD.

• #68 Psychological Treatments and Pharmacological Treatments for Adults with Post-traumatic Stress Disorder (PTSD) | Effective Health Care (EHC) Program

  https://effectivehealthcare.ahrq.gov/products/ptsd-adult-treatment/research-protocol

  Currently, only paroxetine and sertraline are approved by the U.S. Food and Drug Administration for treatment of PTSD. […] One of the primary outcomes in PTSD treatment is symptom reduction, which includes both clinician-rated and self-reported measures. […] Various guidelines and systematic reviews have resulted in contradictory conclusions and recommendations regarding these broad categories of treatments as well as the effectiveness of specific treatments that fit into each of these areas. […] The core of the controversy stems from differences in the rating systems each review applied to assess the strength of evidence of the research data. […] A new review and synthesis of the evidence are needed to address these uncertainties and, as such, are likely to have a significant impact by improving outcomes and reducing variation in treatment guidelines.

• #69 Gene that Helps Form Trauma-Related Memories May Also Help Prevent Post-traumatic Stress Disorder | NYU Langone News

  https://nyulangone.org/news/gene-helps-form-trauma-related-memories-may-also-help-prevent-post-traumatic-stress-disorder

  To further determine if manipulating fkbp5 could prevent the abnormal paths of extinction learning, Galatzer-Levy looked at data taken from a mouse study in which they were fear conditioned, given doses of dexamethasone or a placebo, and then put through fear extinction training the following day. […] Although the change in fkbp5 expression was temporary, the effect of high-dose dexamethasone on extinction learning was permanent, Galatzer-Levy says. […] A treatment like dexamethasone is very appealing because it has very few side effects and is inexpensive, Galatzer-Levy says. It potentially could be an ideal preventative treatment since we know it has effects that alter fear learning and memory.

• #70 Clinical Therapeutic Strategy and Neuronal Mechanism Underlying Post-Traumatic Stress Disorder (PTSD)

  https://www.mdpi.com/1422-0067/20/15/3614

  These observations suggest that dysfunction of FABPs in the brain is associated with the development of a psychiatric disorder. […] We, therefore, speculate that the hypofunction in ACC fails to suppress aberrant BLA neuronal activation during fear conditioning, thereby, impairing the process of fear extinction in Fabp3 null mice. […] In conclusion, we propose and hope that ramelteon is repurposed as a novel therapeutic for treating PTSD in the near future.

• #71 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  Posttraumatic stress disorder (PTSD) develops in a subset of individuals upon exposure to traumatic stress. In addition to well-defined psychological and behavioral symptoms, some individuals with PTSD also exhibit elevated concentrations of inflammatory markers, including C-reactive protein, interleukin-6, and tumor necrosis factor-. […] Numerous factors, including lifetime trauma burden, biological sex, genetic background, metabolic conditions, and gut microbiota, may contribute to inflammation in PTSD. Importantly, inflammation can influence neural circuits and neurotransmitter signaling in regions of the brain relevant to fear, anxiety, and emotion regulation. […] Given the link between PTSD and the immune system, current studies are underway to evaluate the efficacy of anti-inflammatory treatments in those with PTSD. Understanding the complex interactions between PTSD and the immune system is essential for future discovery of diagnostic and therapeutic tools.

• #72 Azthena logo with the word Azthena

  https://www.news-medical.net/news/20250505/Combining-vagus-nerve-stimulation-with-therapy-provides-lasting-PTSD-relief.aspx

  In a first-of-its-kind clinical study, scientists at The University of Texas at Dallas and Baylor University Medical Center showed that patients with treatment-resistant PTSD were symptom-free up to six months after completing traditional therapy paired with vagus nerve stimulation (VNS). […] The study is the largest clinical trial to date using an implanted device for the treatment of PTSD, Kilgard said. […] Pioneering work by TxBDC researchers has demonstrated previously that VNS paired with physical rehabilitation can accelerate neuroplasticity – the rewiring of areas of the brain. […] The National Center for PTSD, part of the Department of Veterans Affairs, estimates that 5% of adults in the U.S. have post-traumatic stress disorder in any given year, and that women are twice as likely to develop PTSD at some point in their life.

• #73 Neurophysiology and Psychopathology Underlying PTSD and Recent Insights into the PTSD Therapies—A Comprehensive Review

  https://www.mdpi.com/2077-0383/9/9/2951

  Clinicians should seek the most accurate diagnostic approaches to choose suitable PTSD-targeted therapeutic options. […] Neuroimaging studies of PTSD patients revealed hyperactivity of limbic and medial brain pathways in generating an exaggerated response to even low-level social threat signals that, in turn, may be a major factor in emotional recognition and mentalization. […] The development of effective diagnostic and therapeutic interventions to treat PTSD is challenging because of the intricate psychopathology and diverse neurophysiological alterations reported in patients. […] PTSD-induced trauma, chronicity induced from the specific of PTSD, gender and patient’s exposure to the traumatic events, and age factors are important other factors in choosing a specific treatment modality.

• #74 Neurophysiology and Psychopathology Underlying PTSD and Recent Insights into the PTSD Therapies—A Comprehensive Review

  https://www.mdpi.com/2077-0383/9/9/2951

  It remains unclear why combat veterans with PTSD are more resistant to treatment modalities than the other PTSD types. […] The clinical efficacy of these antidepressants including fluoxetine is associated with their immunomodulatory properties. […] The modulation of energy metabolism is correlated with alleviation of PTSD symptomatology as noted above. […] Thus, the p11 protein plays a significant role in mood regulation during PTSD, and it is essential to develop novel therapeutic modalities to modulate the function of p11 in PTSD patients comorbid with major depressive disorder.

• #75 Neurophysiology and Psychopathology Underlying PTSD and Recent Insights into the PTSD Therapies—A Comprehensive Review

  https://www.mdpi.com/2077-0383/9/9/2951

  It remains unclear why combat veterans with PTSD are more resistant to treatment modalities than the other PTSD types. […] The clinical efficacy of these antidepressants including fluoxetine is associated with their immunomodulatory properties. […] The modulation of energy metabolism is correlated with alleviation of PTSD symptomatology as noted above. […] Thus, the p11 protein plays a significant role in mood regulation during PTSD, and it is essential to develop novel therapeutic modalities to modulate the function of p11 in PTSD patients comorbid with major depressive disorder.

• #76 Comprehensive Understanding of PTSD: From Pathogenesis to Intervention | Frontiers Research Topic

  https://www.frontiersin.org/research-topics/21025/comprehensive-understanding-of-ptsd-from-pathogenesis-to-intervention/magazine

  The hypothalamicpituitaryadrenal axis (HPA axis) may play an important role in such a difference. Glucocorticoid level has been used as an indicator for HPA axis activation and monitoring glucocorticoid level can help us understand the role of the HPA axis in the pathogenesis of PTSD. […] The research in the pathogenesis of PTSD will eventually return to prediction, prevention and more effective treatment.

• #77 Comprehensive Understanding of PTSD: From Pathogenesis to Intervention | Frontiers Research Topic

  https://www.frontiersin.org/research-topics/21025/comprehensive-understanding-of-ptsd-from-pathogenesis-to-intervention/magazine

  The hypothalamicpituitaryadrenal axis (HPA axis) may play an important role in such a difference. Glucocorticoid level has been used as an indicator for HPA axis activation and monitoring glucocorticoid level can help us understand the role of the HPA axis in the pathogenesis of PTSD. […] The research in the pathogenesis of PTSD will eventually return to prediction, prevention and more effective treatment.

• #78 Comprehensive Understanding of PTSD: From Pathogenesis to Intervention | Frontiers Research Topic

  https://www.frontiersin.org/research-topics/21025/comprehensive-understanding-of-ptsd-from-pathogenesis-to-intervention/magazine

  Post-traumatic stress disorder (PTSD) is a mental health condition with a high rate of disability. PTSD can be triggered by experiencing or witnessing a traumatic event(s). The pathogenesis of PTSD is complicated. It does not occur in a certain group of people or results from one specific type of traumatic event. The key factors that play a crucial role in the development of PTSD are still unknown. Many advances in science have been made in the last decade to better explain the pathogenesis of PTSD. Advances in the brain imaging method have allowed us to study changes in patients’ brains in a non-invasive way. Recent studies have observed the activity or morphology changes of several brain regions in patients with PTSD, including the prefrontal lobe, amygdala, hippocampus. However, it is still unclear how these changes in brain regions are linked to PTSD. Further research needs to be conducted to understand the function of brain regions during the development of PTSD.

• #79 Posttraumatic stress disorder: from diagnosis to prevention | Military Medical Research | Full Text

  https://mmrjournal.biomedcentral.com/articles/10.1186/s40779-018-0179-0

  A recent meta-analysis of 20 studies found increased plasma levels of proinflammatory cytokines tumor necrosis factor-alpha (TNF-a), interleukin-1beta (IL-1b), and interleukin-6 (IL-6) in individuals with PTSD compared to healthy controls. […] Evidence indicates that the development of PTSD is also affected by genetic factors. Research has found that genetic and epigenetic factors account for up to 70% of the individual differences in PTSD development, with PTSD heritability estimated at 30%. […] It is generally acknowledged that some mental diseases, such as major depressive disorder (MDD), bipolar disorder, and schizophrenia, are associated with massive subcortical volume change. Recently, numerous studies have examined the relationship between the morphology changes of subcortical structures and PTSD. […] Overall, rigorous and longitudinal research using new technologies, such as magnetoencephalography, functional MRI, and susceptibility-weighted imaging, are needed for further investigation and identification of morphological changes in the brain after a traumatic exposure.

• #80 The role of the immune system in posttraumatic stress disorder | Translational Psychiatry

  https://www.nature.com/articles/s41398-022-02094-7

  Posttraumatic stress disorder (PTSD) develops in a subset of individuals upon exposure to traumatic stress. In addition to well-defined psychological and behavioral symptoms, some individuals with PTSD also exhibit elevated concentrations of inflammatory markers, including C-reactive protein, interleukin-6, and tumor necrosis factor-. […] Numerous factors, including lifetime trauma burden, biological sex, genetic background, metabolic conditions, and gut microbiota, may contribute to inflammation in PTSD. Importantly, inflammation can influence neural circuits and neurotransmitter signaling in regions of the brain relevant to fear, anxiety, and emotion regulation. […] Given the link between PTSD and the immune system, current studies are underway to evaluate the efficacy of anti-inflammatory treatments in those with PTSD. Understanding the complex interactions between PTSD and the immune system is essential for future discovery of diagnostic and therapeutic tools.

• #81 Post Traumatic Stress Disorder (PTSD) > Fact Sheets > Yale Medicine

  https://www.yalemedicine.org/conditions/post-traumatic-stress-disorder

  Our researchers are exploring the neurobiological underpinnings of PTSD with a goal of developing cures rather than just providing relief from symptoms. […] When you experience a highly arousing event things that make us sad, angry or afraid theres a biological mechanism that encodes and consolidates those memories in a more lasting way than other kinds of memories, says Steven M. Southwick, MD, professor of Psychiatry at Yale School of Medicine and medical director of the Clinical Neurosciences Division of the Department of Veterans Affairs National Center for PTSD. […] Yale Medicine has been at the forefront of PTSD research for more than 25 years, and its affiliation with the Clinical Neurosciences Division of the Department of Veterans Affairs National Center for PTSD has given researchers the unique perspective of working with veterans while exploring the neurobiological underpinnings of the condition.

• #82 Post Traumatic Stress Disorder (PTSD) > Fact Sheets > Yale Medicine

  https://www.yalemedicine.org/conditions/post-traumatic-stress-disorder

  These studies started decades ago, beginning with understanding how the sympathetic nervous system, the fight-or-flight response, can become hyper-responsive in individuals who have PTSD, says Dr. Southwick. The initial research provided an explanation for why a person with PTSD feels hyper-aroused. […] These days, Yale Medicine is continuing to explore the role of neurochemicals and how the brain responds to severe trauma. This research seeks to find more effective treatment options for PTSD. […] It has taken time to get a better understanding of the fear circuitry in the brain and the various mechanisms that the brain uses to deal with stress and trauma, Dr. Southwick says. Theres a tremendous amount still to learn, but we are in a better place to look at interventions that make more sense from whats known about the underlying biological alterations that characterize PTSD.

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