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Emg Remains Fractionated In Parkinson's Disease, Despite Practice-Related Improvements In Performance, D. Flament, D. Vaillancourt, T. Kempf, K. Shannon, D. Cross
Emg Remains Fractionated In Parkinson's Disease, Despite Practice-Related Improvements In Performance, D. Flament, D. Vaillancourt, T. Kempf, K. Shannon, D. Cross
Timothy Kempf
Objective: We studied the ability of patients with Parkinson's disease to improve their performance in a motor task requiring both speed and accuracy in the execution of elbow flexion movements. Our goal was to investigate the changes in electromyographic activity associated with the changes in movement performance.
Methods: Eleven patients on anti-Parkinsonian medication were tested. The patients were selected for being bradykinetic, having little or no resting tremor or dyskinesias, and being in stages II or III of the Hoehn and Yahr rating scale.
Results: The untrained patients displayed multiple bursts of agonist activity, characteristic of Parkinsonian EMG recordings. All …