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Updated: May 10, 2026

Rating L-DOPA-Induced Dyskinesias in the Unilaterally 6-OHDA-Lesioned Rat Model of Parkinson's Disease
Published on: October 4, 2021
Reduced postmovement cortical inhibition in patients with paroxysmal kinesigenic dyskinesia
Wan-Yu Hsu1, Kwong-Kum Liao, Yi-Jhan Tseng
1Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan.
Objective:
To characterize movement-related neural oscillatory activity and to clarify its neurophysiologic role in paroxysmal kinesigenic dyskinesia (PKD).
Methods:
We recorded neuromagnetic event-related desynchronization (ERD) and event-related synchronization (ERS) activities in response to a self-paced finger-lifting task in 16 patients with PKD and 17 healthy controls.
Results:
The amplitude of α-ERD was comparable between the healthy controls and patients with PKD, whereas either the contralateral or ipsilateral β-ERS was decreased. The peak latency of contralateral β-ERS was delayed in patients with PKD. Patients with less frequent dyskinetic attacks demonstrated a larger ipsilateral β-ERS. Moreover, some patients with PKD revealed a lesser degree of contralateral preponderance of β-ERS generation.
Conclusions:
The present data imply a decreased postmovement inhibition of motor cortex in patients with PKD, and the inhibitory function in the contralateral hemisphere is more affected than that in the ipsilateral hemisphere.
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