<unk>  are defined as conditions that involve disruptions or breakdowns of memory, awareness, identity and/or perception. The hypothesis is that symptoms can result, to the extent of interfering with a person's general functioning, when one or more of these functions is disrupted.
The four<unk>  listed in the DSM IV TR are as follows:
Depersonalization<unk> (DSM-IV Codes 300.6) - periods of detachment from self or surrounding which may be experienced as "unreal"  (lacking in control of or "outside of" self) while retaining awareness that this is only a feeling and not a reality.
Derealization<unk> feeling as though one's environment is lacking in spontaneity, emotional colouring and depth.<unk>  Amnesia (DSM-IV Codes 300.12) - noticeable impairment of recall resulting from emotional trauma<unk>  fugue (DSM-IV Codes 300.13) - physical desertion of familiar surroundings and experience of impaired recall of the past. This may lead to confusion about actual identity and the assumption of a new identity.<unk>  identity<unk> (DSM-IV Codes 300.14) - the alternation of two or more distinct personality states with impaired recall, among personality states, of important information.
In addition, there's the diagnosis of<unk> not otherwise specified (DSM-IV Codes 300.15) which can be used for forms of pathological dissociation not covered by any of the specified<unk> .
In a 2007 study, only 28.7% of the<unk>  participants had received psychiatric treatment previously.
Dissociative disorders
Psychopathy
Fetishistic disorder
Depersonalization disorder
Tic disorder
Personality disorder
Exhibitionistic disorder
Substance-related disorder