Related Experiment Videos
Motor initiation versus execution in normal and Parkinson's disease subjects
E B Montgomery1, D S Gorman, J Nuessen
1Department of Neurology and Neurological Surgery (Neurology), Washington University School of Medicine, St. Louis, MO.
Neurology
|September 11, 1991
Summary
Parkinson's disease patients showed slowed motor execution but could still program corrective movements during wrist extensions. This suggests motor control abnormalities in Parkinson's disease affect movement content, not timing.
Area of Science:
- Neuroscience
- Motor Control
- Movement Disorders
Background:
- Understanding motor control is crucial for neurological disorders.
- Parkinson's disease (PD) affects motor function, impacting daily activities.
Purpose of the Study:
- To investigate motor initiation and execution in Parkinson's disease patients.
- To analyze the ability to adjust movement trajectories in response to changing targets.
Main Methods:
- Studied wrist extension movements in normal subjects and PD patients.
- Assessed motor performance before and after medication.
- Analyzed movement trajectories and timing of muscle activity.
Main Results:
- Late target changes resulted in double trajectories, indicating a corrective movement.
- PD patients exhibited slowed movements, suggesting issues with movement content.
- PD patients could program a second movement while the first was ongoing.
Conclusions:
- Parkinson's disease impacts the content of motor programs, not their timing.
- PD patients retain the ability to program corrective movements during ongoing actions.