Dissociative identity disorder

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The growing recognition of psychiatric conditions resulting from traumatic influences is a significant mental health issue of the 1990s. Until recently considered rare and mysterious psychiatric curiosities, Dissociative Identity Disorder (DID) (until very recently known as Multiple Personality Disorder - MPD) and other Dissociative Disorders (DD) are now understood to be fairly common effects of severe trauma in early childhood, most typically extreme, repeated physical, sexual, and/or emotional abuse.
In 1994, with the publication of the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders-IV, Multiple Personality Disorder (MPD) was changed to Dissociative Identity Disorder (DID), reflecting changes in professional understanding of the disorder, which resulted largely from increased empirical research of trauma-based dissociative disorders.
Post-Traumatic Stress Disorder (PTSD), widely accepted as a major mental illness affecting 9-10% of the general population, is closely related to Dissociative Identity Disorder (MPD) and other Dissociative Disorders (DD). In fact, as many as 80-100% of people diagnosed with DID (MPD) also have a secondary diagnosis of PTSD. The personal and societal cost of trauma disorders [including DID (MPD), DD, and PTSD] is extremely high. For example, recent research suggests the risk of suicide attempts among people with trauma disorders may be even higher than among people who have major depression. In addition, there is evidence that people with trauma disorders have higher rates of alcoholism, chronic medical illnesses, and abusiveness in succeeding generations.
What Is Dissociation?
Dissociation is a mental process which produces a lack of connection in a person's thoughts, memories, feelings, actions, or sense of identity. During the period of time when a person is dissociating, certain information is not associated with other information as it normally would be. For example, during a traumatic experience, a person may dissociate the memory of the place and circumstances of the trauma from his ongoing memory, resulting in a temporary mental escape from the fear and pain of the trauma and, in some cases, a memory gap surrounding the experience. Because this process can produce changes in memory, people who frequently dissociate often find their senses of personal history and identity are affected.
Most clinicians believe that dissociation exists on a continuum of severity. This continuum reflects a wide range of experiences and/or symptoms. At one end are mild dissociative experiences common to most people, such as daydreaming, highway hypnosis, or "getting lost" in a book or movie, all of which involve "losing touch" with conscious awareness of one's immediate surroundings.

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