Basic Information on DID from the DSM-IV-TR

Basic Information on DID (from http://members.aol.com/smartnews/Dissociative-Identity-Disorder.htm)

from the DSM-IV-TR (American Psychological Association (2000).

Diagnostic and statistical manual of mental disorders (4th ed. text revision).Washington, D. C .)

DID is defined in the DSM-IV-TR as the presence of two or more personality states or distinct identities that repeatedly take control of one's behavior. The patient has an inability to recall personal information. The extent of this lack of recall is too great to be explained by normal forgetfulness. The disorder cannot be due to the direct physical effects of a general medical condition or substance.

DID entails a failure to integrate certain aspects of memory, consciousness and identity. Patients experience frequent gaps in their memory for their personal history, past and present. Patients with DID report having severe physical and sexual abuse, especially during childhood. There is controversy around these reports, because childhood memories may be exposed to distortion and some patients with DID are highly hypnotizable and vulnerable to suggestive influences. But, the reports of patients with DID are often validated by objective evidence. People that are responsible for acts of sexual and physical abuse may be prone to distorting or denying their behavior.

Physical evidence may include variations in physiological functions in different identity states, including differences in vision, levels of pain tolerance, symptoms of asthma, the response of blood glucose to insulin and sensitivity to allergens. Other physical findings may include scars from physical abuse or self-inflicted injuries, headaches or migraines, asthma and irritable bowel syndrome.

DID is found in a variety of cultures around the world. It is diagnosed three to nine times more often in adult females than males. Females average 15 or more identities, males eight identities. The sharp rise in the reported cases of DID in the U.S. may be due the greater awareness of DID's diagnosis, which has caused an increased identification of those that were previously undiagnosed. Others believe it has been overdiagnosed in those that are highly suggestible.

The average time period from DID's first presentation of symptoms to its diagnosis is six to seven years. DID may become less manifest as patients reach past their late 40's, but it can reemerge during stress, trauma or substance abuse. It is suggested in several studies that DID is more likely to occur with first-degree biological relatives of people that already have DID, than in the regular population.