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Related Experiment Videos

Explicit and procedural memory in Parkinson's disease

H Allain1, A Lieury, V Thomas

  • 1Laboratoire de Pharmacologie, Faculté de Médecine, Rennes, France.

Biomedicine & Pharmacotherapy = Biomedecine & Pharmacotherapie
|January 1, 1995
PubMed
Summary
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Parkinsonian patients show impaired explicit memory recall and some deficits in implicit memory, suggesting cognitive dysregulation. These findings help differentiate procedural and implicit memory functions.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Neurology

Background:

  • Cognitive psychology aims to deconstruct complex tasks into fundamental components.
  • Understanding memory systems is crucial for cognitive function analysis.

Purpose of the Study:

  • To analyze explicit (declarative) and implicit (procedural) memory components in Parkinsonian patients.
  • To compare memory functions between Parkinsonian patients and healthy young and elderly subjects.

Main Methods:

  • Studied 61 undemented, non-depressed Parkinsonian patients undergoing anti-Parkinsonian treatment.
  • Administered verbal recall, face recall, association tests, maze tests, Braille reading, and Toronto tower tests.
  • Analyzed learning and automation processes.

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Main Results:

  • Parkinsonian patients exhibited impaired explicit memory (verbal recall) but preserved face recall.
  • Deficits in implicit memory were observed in association and maze tests.
  • Braille reading and Toronto tower tests did not differentiate Parkinsonian patients from elderly controls.
  • Learning and automation processes were found to be dysfunctional in Parkinsonian patients.

Conclusions:

  • Data suggest dysregulation of cortical-sub-cortical systems in Parkinsonian patients, not exclusively pre-frontal or dopaminergic.
  • Cognitively, procedural and implicit memory should be conceptually dissociated.