Dissociative disorders involve problems with memory, identity, emotion, perception, behavior and sense of self. Dissociative symptoms can potentially disrupt every area of mental functioning.
Examples of dissociative symptoms include the experience of detachment or feeling as if one is outside one’s body, and loss of memory or amnesia. Dissociative disorders are frequently associated with previous experience of trauma.
There are three types of dissociative disorders:
Dissociative identity disorder
Dissociative identity disorder is associated with overwhelming experiences, traumatic events and/or abuse that occurred in childhood. Dissociative identity disorder was previously referred to as multiple personality disorder.
Symptoms of dissociative identity disorder include:
- The existence of two or more distinct identities (or “personality states”). The distinct identities are accompanied by changes in behavior, memory and thinking. The signs and symptoms may be observed by others or reported by the individual.
- Ongoing gaps in memory about everyday events, personal information and/or past traumatic events.
- The symptoms cause significant distress or problems in social, occupational or other areas of functioning.
Depersonalization/ derealization disorder
Depersonalization/ derealization disorder involves significant ongoing or recurring experience of one or both conditions:
- Depersonalization – experiences of unreality or detachment from one’s mind, self or body. People may feel as if they are outside their bodies and watching events happening to them.
- Derealization – experiences of unreality or detachment from one’s surroundings. People may feel as if things and people in the world around them are not real.
During these altered experiences the person is aware of reality and that their experience is unusual. The experience is very distressful, even though the person may appear to be unreactive or lacking emotion.
Symptoms may begin in early childhood; the average age a person first experiences the disorder is 16. Less than 20 percent of people with depersonalization/derealization disorder first experience symptoms after age 20.
Dissociative amnesia
- localized – unable to remember an event or period of time (most common type)
- selective – unable to remember a specific aspect of an event or some events within a period of time
- generalized – complete loss of identity and life history (rare)