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Updated: May 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

Progressive changes in a recognition memory network in Parkinson's disease.

Bàrbara Segura¹, Naroa Ibarretxe-Bilbao, Roser Sala-Llonch

¹Department of Psychiatry and Clinical Psychobiology, University of Barcelona, Casanova 143, Barcelona 08036, Spain.

Journal of Neurology, Neurosurgery, and Psychiatry

|November 3, 2012

Summary

This summary is machine-generated.

Parkinson's disease (PD) patients show progressive changes in brain networks for memory over time. Functional connectivity analysis reveals declining connections, aiding early detection and monitoring of cognitive decline in PD.

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Last Updated: May 17, 2026

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Area of Science:

Neuroscience
Cognitive Neuroscience
Neurology

Background:

Previous functional MRI (fMRI) studies identified recognition memory network dysfunctions in Parkinson's disease (PD).
This study aimed to investigate the longitudinal changes within these specific brain networks over time in PD patients.

Purpose of the Study:

To longitudinally assess changes in functional brain networks associated with recognition memory in Parkinson's disease.
To evaluate the utility of functional connectivity analyses in tracking neurobiological alterations in early-stage PD.

Main Methods:

Utilized fMRI and neuropsychological assessments in 17 PD patients and 13 healthy controls at baseline and follow-up.
Employed model-free independent component analysis (ICA) to analyze fMRI data for changes in functional networks over time.
Applied cross-correlation analysis to quantify alterations in functional connectivity strength between brain regions.

Main Results:

PD patients exhibited reduced recruitment of a key memory network, with decreased activation in frontal and parietal regions.
Specific regions like the orbitofrontal cortex, middle frontal gyrus, and superior parietal lobe showed altered activation patterns.
Longitudinal analysis revealed a significant decrease in functional connectivity strength between the middle frontal gyrus and superior parietal lobe in PD patients.

Conclusions:

Model-free fMRI and cross-correlation analyses successfully detected progressive changes in recognition memory networks in early PD.
These neuroimaging techniques can identify changes even without overt clinical deterioration.
Functional connectivity analysis shows promise as a tool for monitoring brain network changes related to neuropsychological deficits in Parkinson's disease.