Reduplicative paramnesia

Written and reviewed by Dr Ibrahim Imam, Consultant Neurologist. Last reviewed .

Reduplicative paramnesia. This is the delusion that someone or something familiar has been duplicated. Fully referenced neurology checklist.

Clinical features

  • This is the delusion that someone or something familiar has been duplicated
  • It is most frequently reduplication of the subject’s home
  • The subject believes that the original and duplicate both exist independently
  • The subject is not concerned about the delusion
  • It is frequently associated with confabulation
  • It may start up to 3 years after brain insult: case report
  • The onset of the delusion may be delayed

Pathology

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Causes

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References

  1. Hakim H, Verma NP, Greiffenstein MF. Pathogenesis of reduplicative paramnesia. JNNP 1988; 51:839-841.
  2. Politis M, Loane C. Reduplicative paramnesia: a review. Psychopathology 2012; 45:337-343. 
  3. Diamantaras AA, Blondiaux E, Schumacher R, Müri RM, Blanke O, Heydrich L. The neuropsychology and neuroanatomy of reduplicative paramnesia. Cortex 2023 (Online ahead of print).
  4. Filley CM, Jarvis PE. Delayed reduplicative paramnesia. Neurology 1987; 37:701-703.
  5. Joseph AB, O'Leary DH, Kurland R, Ellis HD. Bilateral anterior cortical atrophy and subcortical atrophy in reduplicative paramnesia: a case-control study of computed tomography in 10 patients. Can J Psychiatry 1999; 44:685-689.
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