Dissociative Disorders
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Direct answer
Dissociative disorders are conditions in which memory, identity, consciousness or perception are involuntarily disrupted — the classic teaching is a partial or complete "splitting off" of normally integrated mental functions, usually triggered by unbearable stress or trauma. The main patterns are dissociative amnesia (typically episodic-autobiographical memory loss), dissociative fugue (purposeful travel with loss of identity), dissociative identity disorder (two or more distinct identity states), depersonalisation-derealisation disorder, and dissociative presentations such as trance and possession states that are common in Indian practice. Treatment centres on safety, trauma-focused psychotherapy and reintegration of the lost material.
What you must remember
- Dissociative amnesia: inability to recall personally significant, usually traumatic information — typically episodic and autobiographical, with semantic and procedural memory intact, the reverse of organic amnesia.
- Dissociative fugue: sudden purposeful travel with loss of identity, sometimes a new identity; usually brief, resolving spontaneously with amnesia for the episode.
- Dissociative identity disorder: two or more distinct personality states with recurrent inter-state amnesia, linked to severe early trauma; diagnose cautiously after full evaluation.
- Depersonalisation-derealisation disorder: recurrent detachment from one's body, thoughts or surroundings with intact reality testing — intact insight separates it from psychosis.
- Dissociative trance and possession states: culturally patterned expressions in which a spirit is felt to take control — among the commonest dissociative presentations in India, usually settling with support.
- Treatment principles: ensure safety, stabilise the stressor, trauma-focused psychotherapy (hypnosis-assisted abreaction in selected cases) and treatment of comorbid depression, anxiety or post-traumatic stress.
- Aetiology: overwhelming psychological trauma is the core driver, on a background of childhood adversity and suggestibility.
Common confusion
Dissociative amnesia versus organic amnesia is the standard exam discriminator: dissociative loss is episodic-autobiographical with intact new learning and skills, while organic (say, Korsakoff) amnesia features anterograde impairment with confabulation. Depersonalisation is often confused with psychotic illness, but reality testing stays intact in depersonalisation-derealisation disorder, so the patient knows the experience is not real. Possession trance must also be separated from psychosis — in culturally sanctioned trance the experience is time-limited, shared by the community as meaningful, and does not usually cause chronic functional decline.
Exam-focused takeaway
NEET-PG gives a vignette of sudden memory loss or unexplained travel after an acute stress and expects the specific dissociative label — amnesia, fugue, or identity disorder. One-liners test the episodic-versus-organic memory contrast, intact reality testing in depersonalisation, and the high prevalence of dissociative trance and possession presentations in India. Management questions point to trauma-focused psychotherapy rather than long-term drugs, and to the fact that most acute fugues remit spontaneously with support.
Frequently asked questions
What is the hallmark of dissociative amnesia?
Loss of traumatic episodic memories with semantic knowledge, skills and new learning intact.
How does dissociative fugue present?
Sudden travel from home with identity loss, sometimes a new identity, resolving with amnesia for the episode.
What defines dissociative identity disorder?
Two or more distinct identity states with inter-state amnesia, linked to severe early trauma.
Is depersonalisation a psychotic symptom?
No — insight is retained, distinguishing it from psychotic passivity experiences.
Why are dissociative disorders common in India?
Trance and possession states are culturally accepted expressions of distress after conflict or loss.
What is abreaction in treatment?
Controlled reliving of a repressed traumatic memory, followed by working-through; used selectively.