Dissociative Disorders

Dissociative Identity Disorder

Dissociative Amnesia

Depersonalization / Derealization Disorder

Other Specified Dissociative Disoder

Unspecified Dissociative Disorder


Dissociative Disorders - marked by a loss of memory and division of consciousness from personal identity.

Dissociative Amnesia and Fugue - the sudden break from past memories & personal identity. May be brief (amnesia) due to trauma or long lasting.

Fugue involves the complete loss of identity and memory of past, starting a new life under a new identity. EG David

Dissociative Identity Disorder (Multiple Personality Disorder)
Involves the presence of two or more distinct identities or personalities in one body. Each has name and characteristic style often opposite to "host" with sudden shifting from one to another.  You Tube - Tony

Etiology of Dissociative Disorders - Excessive stress or trauma, fantasy prone personality (hypnosis), intentional role playing, American culture supports its development.

1980s saw a large increase in occurrence Why?
Previously under-diagnosed or now "looking for it".
Swiss psychiatry 6 of 655 had diagnosed 90% of cases.


Or is it a real disorder in response to emotional abuse, such as PTSD? Eye movements and brain patterns show different profiles for each personality.