Posttraumatic stress disorder (PTSD) is a severe anxiety disorder that can develop after exposure to any event that results in psychological trauma. This event may involve the threat of death to oneself or to someone else, or to one’s own or someone else’s physical, sexual, or psychological integrity, overwhelming the individual’s ability to cope. Posttraumatic stress disorder (PTSD) is a complex disorder in which the affected person’s memory, emotional responses, intellectual processes, and nervous system have all been disrupted by one or more traumatic experiences. Diagnostic symptoms for Posttraumatic stress disorder (PTSD) include re-experiencing the original trauma(s) through flashbacks or nightmares, avoidance of stimuli associated with the trauma, and increased arousal—such as difficulty falling or staying asleep, anger, and hypervigilance.
Video: PTSD definition (1 hr 28 min)
Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article PTSD at Wikipedia.org. See the Wikipedia copyright page for more details.