Dissociative Amnesia

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Dissociative Amnesia, formerly Psychogenic Amnesia, is a dissociative disorder characterized by an inability to remember personal information, usually including traumatic events but at times also including identity information such as one's name or family. This loss of recollection causes serious distress in social and daily functioning.

Memories lost in dissociative amnesia are capable of being retrieved. Individuals with dissociative amnesia are frequently mostly or completely unaware of their amnesia before it is pointed out to them and attempt to minimize the severity. Histories of trauma are common among those with dissociative amnesia. Dissociative amnesia can be experienced as part of another disorder.

Types
Localized amnesia involves the inability to recall certain events for a limited period of time after they occur, usually for a few hours after a traumatic or otherwise stressful event but at times lasting for days after.

In selective amnesia, the individual can recall some but not all parts of the event, still usually within the same general circumstances and time frame as localized.

Generalized amnesia is "a complete loss of memory of one's life history," including personal identity, semantic knowledge, and skills. The disorientation in generalized amnesia is typically visible enough for emergency services to become notified of the occurrence.

Continuous amnesia is the inability to recall the events leading up to a particular time, including leading up to the present.

Systematized amnesia is the loss of memories within a certain subject category, such as of a family member.