Word: hyperalert
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...some psychiatric status when DSM-III in 1980 officially defined their suffering as "posttraumatic stress disorder." In such distress, a person develops vivid symptoms after a psychologically traumatic event that is outside the range of usual human experience: he or she grows numb toward the external world, or else hyperalert, jumpy, insomniac; in nightmares the event that brought on the trauma is obsessively replayed...