Other specified dissociative disorder (OSDD) evolved out of dissociative disorder not otherwise specified (DDNOS) as seen in the DSM-V.[1] DDNOS was used in the DSM-IV to represent a cluster of dissociative disorders that did not fit under more common diagnoses like dissociative identity disorder (DID).[1] While OSDD comes from DDNOS, it does not contain all of the original diagnoses. There are currently no available drugs that treat dissociative symptoms directly, however dissociative conditions appear to respond well to psychotherapy.[2][3]
Original DDNOS diagnoses
Under DDNOS, there were a number of dissociative conditions.
- DDNOS 1 - DID but switching not observed by clinician, or amnesia for the significant past but not everyday life.[1]
- DDNOS 1a - Like DID but with less distinct parts/no alters. Alters may be emotional fragments or the same individual at different ages. Can experience emotional amnesia rather than physical amnesia.[1][4]
- DDNOS 1b - Like DID but no amnesia between alters.[1]
- DDNOS 2 - Derealization without Depersonalization.[1]
- DDNOS 3,4,5,etc - DID but with specific symptoms. Eg) Identity change due to brainwashing, acute dissociative reaction, dissociative trance, Ganser Syndrome.[1]
- Dissociative Disorder with Unclear Symptoms. [1]
Evolution of OSDD
OSDD is the combination of DDNOS 1a and DDNOS 1b, meaning that OSDD is a similar diagnosis to DID except that the individual has less intense symptomatology regarding either amnesia or identity separation.[1] OSDD was officially adopted in the DSM-V, which was published in 2013.
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