Posttraumatic Stress Disorder

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Causes

It may be that, when combined, the person's psychological history, the nature of the trauma, and the availability of posttrauma support cause PTSD symptoms to develop after a traumatic event. However, someone without risk factors who is exposed to a traumatic event also may develop symptoms.



Biologic Theories

The amygdala, a structure in the brain, is part of the limbic system that is involved in the expression of emotion, especially fear, autonomic reactions (e.g., increased...Read the full article