The dissociative disorders involve a disturbance in the integrated organization of identity, memory, perception, or consciousness. Events normally experienced on a smooth continuum are isolated from the other mental processes with which they would ordinarily be associated. This discontinuity results in a variety of dissociative disorders depending on the primary cognitive process affected. When memories are poorly integrated, the resulting disorder is dissociative amnesia. Fragmentation of identity results in dissociative fugue or dissociative identity disorder (DID; formerly multiple personality disorder). Disordered perception yields depersonalization disorder. Dissociation of aspects of consciousness produces acute stress disorder and various dissociative trance and possession states (Table 15–1).