EMDR : Eye Movement Desensitization and Reprocessing (EMDR) is a psychotherapy treatment that was originally designed to alleviate the distress associated with traumatic memories (Shapiro, 1989a, 1989b). After successful treatment with EMDR, affective distress is relieved, negative beliefs are reformulated, and physiological arousal is reduced. During EMDR the client attends to emotionally disturbing material in brief sequential doses while simultaneously focusing on an external stimulus. Therapist directed lateral eye movements are the most commonly used external stimulus but a variety of other stimuli including hand-tapping and audio stimulation are often used (Shapiro, 1991). Link to more information at EMDR.com.
PTSD : Posttraumatic Stress Disorder (PTSD) is a psychiatric disorder that can occur following the experience or witnessing of life-threatening events such as military combat, natural disasters, terrorist incidents, serious accidents, or violent personal assaults like rape. People who suffer from PTSD often relive the experience through nightmares and flashbacks, have difficulty sleeping, and feel detached or estranged, and these symptoms can be severe enough and last long enough to significantly impair the person's daily life. Link to more information at National Center for PTSD.
DID : Dissociative Identity Disorder (DID), formerly known as Multiple Personality Disorder (MPD) is considered by the American Psychiatric Association to be one of 4 main kinds of dissociative disorders (DSM-IV): "The essential feature of dissociative disorders is a disturbance or alteration in the normally integrative functions of identity, memory, or consciousness". Link to more information at the SIDRAN web site.