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DSM-IV: Dissociative Amnesia

Patients with this Dissociative Disorder experience marked but reversible impairment of recall of important personal information or experience, usually involving emotional trauma.

Diagnostic criteria for 300.12 Dissociative Amnesia

A. The predominant disturbance is one or more episodes of inability to recall important personal information, usually of a traumatic or stressful nature, that is too extensive to be explained by ordinary forgetfulness.

B. The disturbance does not occur exclusively during the course of Dissociative Identity Disorder, Dissociative Fugue, Post-traumatic Stress Disorder, Acute Stress Disorder, or Somatization Disorder and is not due to the direct physiological effects of a substance (e.g. a drug of abuse, a medication) or a neurological or other general medical condition (e.g. Amnestic Disorder Due to Head Trauma).

C. The symptoms cause clinically significant distress or impairment in social, occupational, or other important areas of functioning.

Based on the Diagnostic & Statistical Manual of Mental Disorders, 4th edition APA

The online Diagnostic & Statistical Manual of Mental Disorders lists most of the major psychological disorders and illnesses and lists the criteria that must be fulfilled in order for a diagnosis to be made. This resource is not a substitute for proper professional psychiatric diagnosis.