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Updated: Jun 23, 2026

Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
07:26

Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking

Published on: September 26, 2019

Source memory and frontal functioning in Parkinson's disease.

Lauren L Drag1, Linas A Bieliauskas, Alfred W Kaszniak

  • 1Department of Psychiatry, University of Michigan, Ann Arbor, Michigan 48105, USA. ldrag@umich.edu

Journal of the International Neuropsychological Society : JINS
|May 1, 2009
PubMed
Summary
This summary is machine-generated.

Parkinson's disease patients exhibit deficits in source memory, which is memory for context. Dopamine medication improved motor function but did not significantly impact source memory in Parkinson's disease patients.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Parkinson's disease (PD) is characterized by dopaminergic neuron loss, affecting motor control and cognitive functions.
  • The prefrontal cortex, crucial for executive functioning and source memory, is interconnected with affected brain regions in PD.
  • Source memory deficits in PD are understudied despite their link to executive functioning.

Purpose of the Study:

  • To investigate source memory and executive functioning in non-demented Parkinson's disease patients.
  • To examine the effect of dopamine medication levels on source memory in PD.

Main Methods:

  • Assessed executive functioning and source memory in PD patients and healthy controls.
  • Administered a medication withdrawal manipulation in PD patients to alter dopamine levels.
  • Compared performance between PD patients (on/off medication) and controls.

Main Results:

  • PD patients showed significant impairments in source memory and executive functioning compared to controls, irrespective of medication status.
  • Anti-Parkinson's medication improved motor performance in PD patients.
  • Medication administration did not yield a significant improvement in source memory performance within the PD group.

Conclusions:

  • Source memory deficits are present in non-demented Parkinson's disease patients.
  • Phasic dopamine changes, influenced by medication, do not appear to significantly modulate source memory in PD.
  • Further research is needed to understand the neural mechanisms underlying source memory impairments in Parkinson's disease.