In DSM-III, this category is called Atypical Dissociative Disorder
This is a residual category to be used for individuals who appear to have a Dissociative Disorder but do not satisfy the criteria for a specific Dissociative Disorder. Examples include trance-like states, derealization unaccompanied by depersonalization, and those more prolonged dissociated states that may occur in persons who have been subjected to periods of prolonged and intense coercive persuasion (brainwashing, thought reform, and indoctrination while the captive of terrorists or cultists).
In DSM-IV, this disorder is called Dissociative Disorder Not Otherwise Specified
This category is included for disorders in which the predominant feature is a dissociative symptom (i.e., a disruption in the usually integrated functions of consciousness, memory, identity, or perception of the environment) that does not meet the criteria for any specific Dissociative Disorder. Examples include
- Clinical presentations similar to Dissociative Identity Disorder that fail to meet full criteria for this disorder. Examples include presentations in which a) there are not two or more distinct personality states, or b) amnesia for important personal information does not occur.
- Derealization unaccompanied by depersonalization in adults.
- States of dissociation that occur in individuals who have been subjected to periods of prolonged and intense coercive persuasion (e.g., brainwashing, thought reform, or indoctrination while captive).
- Dissociative trance disorder: single or episodic disturbances in the state of consciousness, identity, or memory that are indigenous to particular locations and cultures. Dissociative trance involves narrowing of awareness of immediate surroundings or stereotyped behaviors or movements that are experienced as being beyond one's control. Possession trance involves replacement of the customary sense of personal identity by a new identity, attributed to the influence of a spirit, power, deity, or other person, and associated with stereotyped "involuntary" movements or amnesia. Examples include amok (Indonesia), bebainan (Indonesia), latah (Malaysia), pibloktoq (Arctic), ataque de nervios (Latin America), and possession (India). The dissociative or trance disorder is not a normal part of a broadly accepted collective cultural or religious practice.
- Loss of consciousness, stupor, or coma not attributable to a general medical condition.
- Ganser syndrome: the giving of appropriate answers to questions (e.g., "2 plus 2 equals 5") when not associated with Dissociative Amnesia or Dissociative Fugue.
This category applies to presentations in which symptoms characteristic of a dissociative disorder that cause clinically significant distress or impairment in social, occupational, or other important areas of functioning predominate but do not meet the full criteria for any of the disorders in the dissociative disorders diagnostic class. The unspecified dissociative disorder category is used in situations in which the clinician chooses not to specify the reason that the criteria are not met for a specific dissociative disorder, and includes presentations for which there is insufficient information to make a more specific diagnosis (e.g., in emergency room settings).