Post-Traumatic Stress Disorder

I

Introduction

Post-Traumatic Stress Disorder, mental illness that some people develop after experiencing traumatic or life-threatening events. Such events include warfare, rape and other sexual assaults, violent physical attacks, torture, child abuse, natural disasters such as earthquakes and floods, and automobile or airplane crashes. People who witness traumatic events may also develop the disorder.

Post-traumatic stress disorder in war veterans is sometimes called shell shock or combat fatigue. In victims of sexual or physical abuse, the disorder has been called rape trauma or battered woman syndrome. The American Psychiatric Association (APA) adopted the current name of the disorder in 1980.

II

Symptoms

People with this disorder relive the traumatic event again and again through nightmares and disturbing memories during the day. They sometimes have flashbacks, in which they suddenly lose touch with reality and relive images, sounds, and other sensations from the trauma. Because of their extreme anxiety and distress about the event, they try to avoid anything that reminds them of it. They may seem emotionally numb, detached, irritable, and easily startled. They may feel guilty about surviving a traumatic event that killed other people. Other symptoms include trouble concentrating, depression, and sleep difficulties. Symptoms of the disorder usually begin shortly after the traumatic event, although some people may not show symptoms for several years. If left untreated, the disorder can last for years.

Post-traumatic stress disorder can severely disrupt one’s life. Besides the emotional pain of reliving the trauma, the symptoms of the disorder may cause a person to think that he or she is “going crazy.” In addition, people with this disorder may have unpredictable, angry outbursts at family members. At other times, they may seem to have no affection for their loved ones. Some people try to mask their symptoms by abusing alcohol or drugs (see Drug Dependence). Others work very long hours to prevent any “down” periods when they might relive the trauma. Such actions may delay the onset of the disorder until these individuals retire or become sober.

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III

Prevalence

Studies have found from 1 to 14 percent of people suffer from post-traumatic stress disorder at some point during their lives. The findings vary widely due to differences in the populations studied and the research methods used. Among people who have survived traumatic events, the prevalence appears to be much higher. The disorder may be particularly prevalent among people who have served in combat. For example, one study of veterans of the Vietnam War (1959-1975) found that veterans exposed to a high level of combat were nine times more likely to have post-traumatic stress disorder than military personnel who did not serve in the war zone of Southeast Asia.

IV

Causes

Post-traumatic stress disorder is an extreme reaction to extreme stress. In moments of crisis, people respond in ways that allow them to endure and survive the trauma. Afterward those responses, such as emotional numbing, may persist even though they are no longer necessary.

Not everyone who experiences a traumatic event develops post-traumatic stress disorder. Several factors influence whether people develop the disorder. Those who experience severe and prolonged trauma are more likely to develop the disorder than people who experience less severe trauma. Additionally, those who directly witness or experience death, injury, or attack are more likely to develop symptoms.

People may also have existing biological and psychological vulnerabilities that make them more likely to develop the disorder. Those with histories of anxiety disorders in their families may have inherited a genetic predisposition to react more severely to stress and trauma than other people. In addition, people’s life experiences, especially in childhood, can affect their psychological vulnerability to the disorder. For example, people whose early childhood experiences made them feel that events are unpredictable and uncontrollable have a greater likelihood than others of developing the disorder. Individuals with a strong, supportive social network of friends and family members seem somewhat protected from developing post-traumatic stress disorder.

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