10 Post Traumatic Stress Disorder: DSM-III(R) A.The person has experienced an event that is outside the range of usual human experience and that would be markedly distressing to almost everyone. B.The traumatic event is persistently re-experienced in at least one of the following ways: (1) recurrent and intrusive distressing recollections of the event (2) recurrent distressing dreams of the event (3) sudden acting as if the traumatic event were re-occurring (4) intense psychological distress at exposure to events that symbolize or resemble an aspect of the traumatic event, including anniversaries of the event C.Persistent avoidance of stimuli associated with the trauma or numbing of general responsiveness( not present before the trauma), as indicated by at least 3 of the following: (1) efforts to avoid thoughts or feelings associated with the trauma (2) efforts to avoid activities or situations that arouse recollections of the trauma (3) inability to recall an important aspect of the trauma (psychogenic amnesia) (4) markedly diminished interest in significant activities (5) feelings of detachment or estrangement from others (6) restricted range of affect (7) sense of foreshortened future D.Persistent symptoms of increased arousal, as evidenced by at least 2 of the following: (1) difficulty in falling or staying asleep (2) irritability or outbursts of anger (3) difficulty concentrating (4) hypervigilance (5) exaggerated startle response (6) physiological reactivity upon exposure to events that resemble an aspect of the traumatic event E.Duration of the disturbance (symptoms in B,C, and D) of at least one month. Specify delayed onset if onset of symptoms was at least six months after the trauma.