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Related Experiment Videos

Pathogenesis of reduplicative paramnesia.

H Hakim1, N P Verma, M F Greiffenstein

  • 1Neurology Services, Allen Park VA Medical Center, MI 48101.

Journal of Neurology, Neurosurgery, and Psychiatry
|June 1, 1988
PubMed
Summary
This summary is machine-generated.

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Reduplicative paramnesia, a rare neurological disorder, is linked to acute right-sided brain lesions in alcoholic patients. This finding supports the theory of right hemispheric damage underlying this condition.

Area of Science:

  • Neuroscience
  • Neurology
  • Psychiatry

Background:

  • Reduplicative paramnesia is a rare neurological phenomenon where patients believe a person or place has been duplicated.
  • Previous research suggests a link between reduplicative paramnesia and brain lesions, particularly in the right hemisphere.

Purpose of the Study:

  • To investigate the incidence and neuroanatomical correlates of reduplicative paramnesia in alcoholic inpatients.
  • To determine if acute right hemispheric lesions are associated with reduplicative paramnesia in this population.

Main Methods:

  • A structured interview was used to assess 50 consecutive alcoholic inpatients for reduplicative paramnesia.
  • Neuroimaging data (lesion location) were analyzed for patients with and without reduplicative paramnesia.

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Main Results:

  • Four out of 50 alcoholic inpatients (8%) exhibited reduplicative paramnesia.
  • Three of the four patients with reduplicative paramnesia had acute right hemispheric lesions.
  • No patients with reduplicative paramnesia had left hemispheric lesions, while 19 non-RP patients had left hemispheric lesions.

Conclusions:

  • The findings support the hypothesis that acute right hemispheric lesions are a key neuroanatomical basis for reduplicative paramnesia.
  • This right hemispheric lesion likely occurs in the context of pre-existing chronic diffuse or bifrontal brain deficits common in alcoholism.