Posttraumatic Stress Disorder (PTSD) is an anxiety disorder that can develop after exposure to a terrifying event or ordeal in which grave physical harm occurred or was threatened. It is a severe and ongoing emotional reaction to an extreme psychological trauma . This stressor may involve someone’s actual death or a threat to the patient’s or someone else’s life, serious physical injury, or threat to physical and/or psychological integrity, to a degree that usual psychological defenses are incapable of coping….

The four dissociative disorders listed in the DSM IV TR are as follows:

Depersonalization disorder (DSM-IV Codes 300.6 – periods of detachment from self or surrounding which may be experienced as “unreal” (lacking in control of or “outside of” self) while retaining awareness that this is only a feeling and not a reality.

Dissociative Amnesia (DSM-IV Codes 300.12 – noticeable impairment of recall resulting from emotional trauma

Dissociative fugue (DSM-IV Codes 300.13 – physical desertion of familiar surroundings and experience of impaired recall of the past. This may lead to confusion about actual identity and the assumption of a new identity.

Dissociative identity disorder ‘( DSM-IV Codes 300.14 – the alternation of two or more distinct personality states with impaired recall, among personality states, of important information.