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Updated: Jun 17, 2026

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

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

Enhanced frontal function in Parkinson's disease.

R Cools¹, A Miyakawa, M Sheridan

¹Donders Institute for Brain, Cognition and Behaviour, Centre for Cognitive Neuroimaging, Radboud University Nijmegen Medical Centre, Department of Psychiatry, The Netherlands. roshan.cools@donders.ru.nl

Brain : a Journal of Neurology

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Summary

This summary is machine-generated.

Parkinson's disease patients showed improved distraction resistance but worse working memory when off dopamine medication. Dopamine therapy normalized these cognitive functions, suggesting a balance in brain dopamine levels is key.

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Dynamic Digital Biomarkers of Motor and Cognitive Function in Parkinson's Disease

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Last Updated: Jun 17, 2026

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

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Published on: September 26, 2019

Dynamic Digital Biomarkers of Motor and Cognitive Function in Parkinson's Disease

Dynamic Digital Biomarkers of Motor and Cognitive Function in Parkinson's Disease

Published on: July 24, 2019

Area of Science:

Neuroscience
Cognitive Psychology
Neurology

Background:

Dopamine plays a crucial role in cognitive functions, including working memory.
Parkinson's disease is characterized by dopamine deficiency, particularly in the striatum.
The impact of dopamine levels on specific working memory components remains under investigation.

Purpose of the Study:

To investigate the role of dopamine in working memory.
To examine how dopaminergic medication withdrawal affects cognitive performance in Parkinson's disease patients.
To explore the relationship between dopamine levels and distractibility versus memory span.

Main Methods:

Assessed working memory performance in Parkinson's disease patients OFF and ON dopaminergic medication, compared to controls.
Utilized a delayed response task to measure resistance to distraction.
Employed a backward digit span test to evaluate working memory capacity.

Main Results:

Parkinson's disease patients OFF medication exhibited enhanced resistance to distraction but impaired backward digit span performance.
Dopaminergic medication normalized both distractibility and backward digit span performance.
Performance of patients ON medication did not differ from controls.

Conclusions:

Altered dopamine levels in Parkinson's disease significantly impact working memory components.
Hypothesize that low striatal and potentially upregulated frontal dopamine contribute to observed cognitive changes.
Dopaminergic medication may restore cognitive function by rebalancing dopamine transmission between the striatum and prefrontal cortex.