Post-traumatic stress disorder

The 13th of November 1975 marked a turning point in how the world understood the psychological scars of war, when Ann Wolbert Burgess and Lynda Lytle Holmstrom published their groundbreaking work on rape trauma syndrome. They realized that the psychological devastation suffered by rape victims mirrored the breakdown seen in soldiers returning from the Vietnam War, shattering the belief that trauma was solely a battlefield phenomenon. This revelation forced psychiatry to confront a harsh reality: the human mind could be broken by violence in a bedroom just as easily as in a foxhole. Before this moment, the condition was known by a shifting array of euphemisms that obscured the pain, from shell shock in the First World War to battle fatigue in the Second World War, and operational exhaustion during the Korean War. The term post-traumatic stress disorder finally entered the Diagnostic and Statistical Manual of Mental Disorders in 1980, but it was the specific experiences of Vietnam veterans that provided the blueprint for its definition. The American Psychiatric Association officially recognized the disorder, yet the diagnosis remained heavily skewed toward combat, leaving civilian trauma largely invisible for decades. The history of the condition stretches back much further than the 1980s, with evidence of trauma symptoms appearing in ancient Assyrian texts from 1300 to 600 BCE, where soldiers faced immense challenges reconciling their wartime actions with civilian life. Even the writings of William Shakespeare around 1597 captured the symptom constellation of the disorder through Lady Percy's soliloquy in Henry IV, Part 1, describing a state of hyperarousal and emotional detachment that modern medicine would only name centuries later. The evolution of the diagnosis reflects a struggle to name the unnameable, with comedian George Carlin later criticizing the euphemism treadmill for burying the pain under layers of jargon. The condition is not merely a memory of the past but a physiological state where the brain's fear response becomes permanently stuck, creating a cycle of hyperarousal and avoidance that can persist for decades.

The Biology Of Fear

A 2007 study of Vietnam War combat veterans revealed a startling physical reality: those with post-traumatic stress disorder had a 20% reduction in the volume of their hippocampus compared to veterans without the symptoms. This structural change in the brain suggests that the trauma itself physically alters the organ responsible for placing memories in the correct context of space and time. When a person with the disorder encounters stimuli similar to the traumatic event, the body perceives the event as occurring again because the memory was never properly recorded. The amygdala, responsible for threat detection, becomes hyperactive, while the hippocampus and the medial prefrontal cortex, which normally regulate fear, fail to exert their inhibitory control. This imbalance creates a state of chronic hyperarousal where the fight-or-flight response is constantly triggered, even in the absence of immediate danger. Biochemical changes further complicate the picture, with individuals showing low secretion of cortisol and high secretion of catecholamines, resulting in a norepinephrine-to-cortisol ratio that is significantly higher than in non-diagnosed individuals. The hypothalamic-pituitary-adrenal axis, which coordinates the hormonal response to stress, is implicated in the over-consolidation of memories that occurs in the aftermath of trauma. Research by neuroscientist Dr. Rachel Yehuda has shown that psychological trauma can travel across generations, specifically focusing on trans-generational trauma with Holocaust survivors and their offspring. Her team identified a stress gene called FKBP5 that is linked to the disorder, demonstrating an effect on methylation of the gene in both the parents who experienced trauma in concentration camps and their offspring. This genetic component suggests that approximately 30% of the variance in the disorder is caused by heredity alone, with twin pairs exposed to combat showing a higher risk if their identical twin also suffered from the condition. The immune system also plays a role, with studies finding dysfunction involving elevated cytokine levels and a higher risk of immune-related chronic diseases among individuals with the disorder. Neuroimmune dysfunction has been found in the condition, raising the possibility of a suppressed central immune response due to reduced activity of microglia in the brain. The disorder is not simply a psychological state but a complex interplay of genetics, neurobiology, and immune response that creates a maladaptive learning pathway to fear.

Common questions

When was post-traumatic stress disorder officially added to the Diagnostic and Statistical Manual of Mental Disorders?

Post-traumatic stress disorder was officially added to the Diagnostic and Statistical Manual of Mental Disorders in 1980. The term entered the DSM-III that year, heavily influenced by the experiences of Vietnam War veterans. This addition marked a shift from viewing the condition as a sign of weakness to recognizing it as a physiological and psychological response to extreme stress.

What physical changes occur in the brain of a person with post-traumatic stress disorder?

A 2007 study of Vietnam War combat veterans revealed that those with post-traumatic stress disorder had a 20% reduction in the volume of their hippocampus compared to veterans without the symptoms. The amygdala becomes hyperactive while the hippocampus and the medial prefrontal cortex fail to exert their inhibitory control, creating a state of chronic hyperarousal. Biochemical changes include low secretion of cortisol and high secretion of catecholamines, resulting in a norepinephrine-to-cortisol ratio that is significantly higher than in non-diagnosed individuals.

What percentage of adults in the United States have post-traumatic stress disorder in a given year?

In the United States, about 3.5% of adults have post-traumatic stress disorder in a given year. The global picture reveals a stark disparity in prevalence, with rates in much of the rest of the world during a given year being between 0.5% and 1%. Rates skyrocket to 6% and 15% respectively in war-exposed or less economically developed countries.

Which treatments have the strongest evidence for reducing symptoms of post-traumatic stress disorder?

The approaches with the strongest evidence include behavioral and cognitive-behavioral therapies such as prolonged exposure therapy, cognitive processing therapy, and eye movement desensitization and reprocessing. A 2018 systematic review found moderate strength of evidence to support the efficacy of eye movement desensitization and reprocessing for reduction in symptoms, loss of diagnosis, and reduction in depressive symptoms. Selective serotonin reuptake inhibitors and serotonin-norepinephrine reuptake inhibitors are the first-line medications used for the disorder and are moderately beneficial for about half of people.

How does culture influence the understanding and diagnosis of post-traumatic stress disorder?

Cultural and medical anthropologists have questioned the validity of applying the diagnostic criteria of post-traumatic stress disorder cross-culturally as the primarily Euro-American research on trauma is necessarily limited. In Nepal, ethnopsychology studies have found that cultural idioms and concepts related to trauma often do not translate to western terminologies, with the term piDaa aligning to trauma and suffering but also indicating that people who suffer from it are considered mad and subject to negative social stigma. Anthropologists believe applying the term social suffering or cultural bereavement to be more beneficial for trauma that extends beyond the individual.

The Silent Epidemic

In the United States, about 3.5% of adults have the disorder in a given year, and 9% of people develop it at some point in their lives, yet the global picture reveals a stark disparity in prevalence. In much of the rest of the world, rates during a given year are between 0.5% and 1%, but these figures skyrocket to 6% and 15% respectively in war-exposed or less economically developed countries. The risk of developing the condition varies significantly by trauma type, with the highest rates following exposure to torture at 40% and sexual violence at 11.4%, particularly rape at 19.0%. Women are more likely to experience the kind of high-impact traumatic event that can lead to the disorder, such as interpersonal violence and sexual assault, making them more likely to develop it than men. However, men are more likely to experience a traumatic event of any type, creating a complex demographic picture where the nature of the trauma dictates the outcome. The disorder is not limited to combat; motor vehicle collision survivors, both children and adults, are at an increased risk, with the risk almost doubling to 4.6% for life-threatening auto accidents. The unexpected death of a loved one accounts for approximately 20% of cases worldwide, despite the majority of people who experience this type of event not developing the disorder. Cancer survivors present with lifelong symptoms at a rate of 22%, and 24% to 30.1% of women experience symptoms following childbirth, dropping to 13.6% at six months postpartum. The prevalence of the disorder in refugee populations ranges from 4% to 86%, with displaced persons facing higher rates of mental distress due to past and ongoing trauma. Groups that are particularly affected and whose needs often remain unmet include women, older people, and unaccompanied minors. The social consequences are profound, with social disability increasing 17-fold when categorized as having probable symptoms, and the risk of developing an alcohol problem doubling for those with psychological morbidity. The disorder affects educational success and economic stability, creating a cycle of suffering that extends far beyond the individual.

The History Of Silence

The 1666 Fire of London left Samuel Pepys with intrusive and distressing symptoms that would today be recognized as post-traumatic stress disorder, yet his diary remained a private testament to a condition that would remain unnamed for centuries. During the world wars, the condition was known under various terms, including shell shock, war nerves, neurasthenia, and combat neurosis, each term reflecting the era's limited understanding of the psychological impact of war. The diagnosis of gross stress reaction in the DSM-I of 1952 included language relating the condition to combat as well as to civilian catastrophe, but it was the Vietnam War that catalyzed the modern understanding of the disorder. The United States Department of Veterans Affairs estimates that 830,000 Vietnam War veterans had symptoms of the disorder, with the National Vietnam Veterans' Readjustment Study finding 15% of male and 9% of female veterans had the condition at the time of the study. A reanalysis of this data found that four out of five veterans reported recent symptoms when interviewed 20 to 25 years after Vietnam, challenging the initial belief that the disorder was transient. The addition of the term to the DSM-III in 1980 was greatly influenced by the experiences and conditions of U.S. military veterans, yet the diagnosis remained heavily skewed toward combat, leaving civilian trauma largely invisible for decades. The 1975 publication of rape trauma syndrome by Burgess and Holmstrom drew attention to the striking similarities between the experiences of soldiers returning from war and of rape victims, paving the way for a more comprehensive understanding of the causes of the disorder. The DSM-5, created in 2013, established a new category called trauma and stressor-related disorders, moving the condition out of the anxiety disorders classification. Despite these advancements, the condition remains stigmatized, with the term disorder often used to avoid the stigma associated with the word, and the history of the condition reflecting a struggle to name the unnameable. The evolution of the diagnosis reflects a shift from viewing the condition as a sign of weakness to recognizing it as a physiological and psychological response to extreme stress.

The Search For Healing

The 2020 approval of the NightWare Apple Watch app marked a new chapter in the treatment of the disorder, aiming to improve sleep for people suffering from nightmares by vibrating when it detects a nightmare in progress based on monitoring heart rate and body movement. While the disorder has no cure, the main treatments are counseling and medication, with most combination therapy not seeming to be more effective than psychotherapy alone, except for MDMA-assisted psychotherapy. The U.S. Food and Drug Administration rejected MDMA for treating the disorder in 2024, citing trial design and safety concerns, though Canada regulates limited distribution of the substance upon application to and approval by Health Canada. Selective serotonin reuptake inhibitors and serotonin-norepinephrine reuptake inhibitors are the first-line medications used for the disorder and are moderately beneficial for about half of people, but medications other than some SSRIs or SNRIs do not have enough evidence to support their use. Benzodiazepines, often used for acute anxiety, may actually worsen outcomes and increase the risk of developing the disorder two to five times, leading many experts to consider them relatively contraindicated until all other treatment options are exhausted. The approaches with the strongest evidence include behavioral and cognitive-behavioral therapies such as prolonged exposure therapy, cognitive processing therapy, and eye movement desensitization and reprocessing. Eye movement desensitization and reprocessing, developed by Francine Shapiro, involves the therapist initiating voluntary rapid eye movements while the person focuses on memories, feelings, or thoughts about a particular trauma. A 2018 systematic review found moderate strength of evidence to support the efficacy of eye movement desensitization and reprocessing for reduction in symptoms, loss of diagnosis, and reduction in depressive symptoms. The benefits were greater for women with a history of sexual assault compared with people who had experienced other types of traumatizing events, such as accidents, physical assaults, and war. The eye movement component of the therapy may not be critical for benefit, but the combination of exposure and cognitive processing has shown success in treating the primary problems of the disorder and co-occurring depressive symptoms. The U.S. Department of Veterans Affairs has been actively training mental health treatment staff in prolonged exposure therapy and cognitive processing therapy in an effort to better treat U.S. veterans with the disorder.

The Cultural Divide

The 1980s introduction of the disorder into the DSM-III was based on American veterans of the Vietnam War, creating a diagnostic framework that struggles to encompass the disorder's expression across different cultures. Cultural and medical anthropologists have questioned the validity of applying the diagnostic criteria of the disorder cross-culturally, as the primarily Euro-American research on trauma is necessarily limited. In Nepal, ethnopsychology studies have found that cultural idioms and concepts related to trauma often do not translate to western terminologies, with the term piDaa aligning to trauma and suffering but also indicating that people who suffer from it are considered mad and subject to negative social stigma. For many cultures, there is no single linguistic corollary to the disorder, with psychological trauma being a multi-faceted concept with corresponding variances of expression. Designating the effects of trauma as an affliction of the spirit is common in many non-Western cultures, where idioms such as soul loss and weak heart indicate a preference to confer suffering to a spirit-body or heart-body diametric. These idioms reflect the emphasis that collectivist cultures place on healing trauma through familial, cultural, and religious activities while avoiding the stigma that accompanies a mind-body approach. Prescribing diagnostic criteria within these communities is ineffective and often detrimental, as the clear-cut rubric for diagnosing the disorder does not allow for culturally contextual reactions to take place. Displaced people of the African country Burundi experienced symptoms of depression and anxiety, though a few symptoms specific to the disorder were noted, while Sudanese refugees relocated in Uganda were concerned with material effects rather than psychological distress. The disorder extends beyond the individual, with the prolonged exposure to mass violence leading to continuous suffering among civilians, soldiers, and bordering countries. Anthropologists believe applying the term social suffering or cultural bereavement to be more beneficial for trauma that extends beyond the individual, highlighting the need for culturally appropriate and carefully tailored support interventions. The history of the condition reflects a struggle to name the unnameable, with the term disorder often used to avoid the stigma associated with the word, and the evolution of the diagnosis reflecting a shift from viewing the condition as a sign of weakness to recognizing it as a physiological and psychological response to extreme stress.