<unk> s (DD) are conditions that involve disruptions or breakdowns of memory, awareness, identity, or perception. People with<unk> s use dissociation as a defense mechanism, pathologically and involuntarily. The individual suffers these dissociations to protect themselves. Some<unk> s are triggered by psychological trauma, but depersonalization-derealization disorder may be preceded only by stress, psychoactive substances, or no identifiable trigger at all. The<unk> s listed in the American Psychiatric Association's DSM-5 are as follows: *<unk>  identity disorder (formerly multiple personality disorder): the alternation of two or more distinct personality states with impaired recall among personality states. In extreme cases, the host personality is unaware of the other, alternating personalities; however, the alternate personalities can be aware of all the existing personalities. *<unk>  amnesia (formerly psychogenic amnesia): the temporary loss of recall memory, specifically episodic memory, due to a traumatic or stressful event. It is considered the most common<unk>  amongst those documented. This disorder can occur abruptly or gradually and may last minutes to years depending on the severity of the trauma and the patient.<unk>  fugue was previously a separate category but is now treated as a specifier for<unk>  amnesia. * Depersonalization-derealization disorder: periods of detachment from self or surrounding which may be experienced as "unreal" (lacking in control of or "outside" self) while retaining awareness that this is only a feeling and not a reality. * The old category of<unk>  not otherwise specified is now split into two: other specified<unk> , and unspecified<unk> . These categories are used for forms of pathological dissociation that do not fully meet the criteria of the other specified<unk> s; or if the correct category has not been determined; or the disorder is transient. The ICD11 lists<unk> s as: *<unk>  neurological symptom disorder *<unk>  amnesia *<unk>  amnesia with<unk>  fugue * Trance disorder * Possession trance disorder *<unk>  identity disorder * Partial<unk>  identity disorder * Depersonalization-derealization disorder
Dissociative disorder
Psychopathy
Internalizing disorder
Tic disorder
Externalizing disorder
Transference neurosis
Somatization disorder
Personality disorder