Parkinson's disease impairs cortical sensori-motor decision-making cascades
Alessandro Tomassini1, Thomas E Cope1,2,3, Jiaxiang Zhang4
1MRC Cognition and Brain Sciences Unit, University of Cambridge, Cambridge CB2 7EF, UK.
Brain Communications
|March 20, 2024
Summary
Parkinson's disease disrupts the brain's ability to process sensory information and select actions, particularly affecting beta oscillations crucial for decision-making. This leads to inefficient information transfer and altered visuomotor control.
Area of Science:
- Neuroscience
- Cognitive Science
- Neurology
Background:
- Action execution involves complex neuronal decisions.
- Oscillatory brain activity underlies decision-making processes.
Purpose of the Study:
- Investigate Parkinson's disease impact on action selection and execution.
- Map cortical oscillatory signatures of decision-making.
Main Methods:
- Combined magneto-electroencephalography (MEG) and linear ballistic accumulator models.
- Utilized a visuomotor task with manipulated sensory and action uncertainty.
- Optimized generative accumulator models to neurophysiological data.
Main Results:
- Confirmed beta oscillations' role in evidence accumulation and response selection.
- Identified disrupted beta-mediated cascade in Parkinson's disease patients.
- Observed inefficient perceptual information processing in frontal cortical regions.
Conclusions:
- Disrupted oscillatory mechanisms contribute to Parkinson's disease behavioral changes.
- Abnormal visuomotor function is linked to pathological oscillatory activity.
- Targeting oscillatory disruptions may improve Parkinson's disease outcomes.
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