Studies have been conducted where during these dramatic and gripping sessions, a soldier sits hunched over on his hospital bed, staring blankly ahead, responding to nothing and no one until the single word "bomb" is uttered. he said, then dived for cover under the cot. Another man lies nearly naked on the bare floor, his back rigidly arched, his arms and hands clawing at the air as he tries, spasmodically and unsuccessfully, to climb onto his side and stand up. Yet another, who once bayoneted an enemy in the face, now opens his mouth wide in a gaping yaw and then closes it, and opens it and closes it, again and again and again. PTSD was initially thought to represent a normative response, at the extreme end of a continuum of responses, the severity of which was primarily related to the intensity of the trauma/stressor. However, it has become clear over time that an individual's response to trauma depends not only on the characteristics of the stressor, but also on factors specific to the individual (Sherin