Corticospinal disinhibition in paroxysmal kinesigenic dyskinesia

S. Y. Kang, Y. H. Sohn, H. S. Kim, C. H. Lyoo, M. S. Lee

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Objective: To investigate the underlying mechanism responsible for paroxysmal kinesigenic dyskinesia (PKD). Methods: We performed a transcranial magnetic stimulation (TMS) study in 12 drug-naïve patients with PKD and 10 healthy volunteers. TMS parameters included resting motor threshold, recruitment curve of motor evoked potential amplitudes, short intracortical inhibition and facilitation, long intracortical inhibition (LICI), and silent period. We also measured compound muscle action potential. Results: LICI, representing GABA-mediated inhibition, was significantly reduced in the patients (P=0.033), while results for all other TMS parameters tested were comparable between the two groups. Conclusions and significance: These results suggest that a specific type of corticospinal inhibitory mechanism is impaired in patients with PKD.

Original languageEnglish
Pages (from-to)57-60
Number of pages4
JournalClinical Neurophysiology
Issue number1
Publication statusPublished - 2006 Jan

All Science Journal Classification (ASJC) codes

  • Sensory Systems
  • Neurology
  • Clinical Neurology
  • Physiology (medical)


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