Dissociative Amnesia
Overview
- Includes several forms of psychogenic memory loss
- Generalized vs. localized or selective type
- May involve dissociative fugue
- During the amnestic episode, person travels or wanders, sometimes assuming a new identity in a different place
- Unable to remember how or why one has ended up in a new place
- Ex: Three faces of Eve
DSM-5 Criteria
- A. An inability to recall important autobiographical information, usually of a traumatic or stressful nature, that is inconsistent with ordinary forgetting.
- Note: Dissociative amnesia most often consists of localized or selective amnesia for a specific event or events; or generalized amnesia for identity and life history.
- B. The symptoms cause clinically significant distress or impairment in social, occupational, or other important areas of functioning.
- C. The disturbance is not attributable to the physiological effects of a substance or a neurological or other medical condition.
- D. The disturbance is not better explained by dissociative identity disorder, posttraumatic stress disorder, acute stress disorder, somatic symptom disorder, or major or mild neurocognitive disorder.
- Specify if:
- With dissociative fugue: Apparently purposeful travel or bewildered wandering that is associated with amnesia for identity or for other important autobiographical information.
Statistics
- Prevalence: 2 to 7%
- Usually begin in adulthood
- Rarely appear in childhood or late adulthood
- Show rapid onset and dissipation
- Causes
- Little is known
- Trauma and stress can serve as triggers
- Most recover/remember without treatment