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Resetting of essential tremor and postural tremor in Parkinson's disease with transcranial magnetic stimulation

✍ Scribed by Dr. A. Pascual-Leone; Dr. J. Valls-Solé; C. Toro; E. M. Wassermann; Dr. M. Hallett

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
706 KB
Volume
17
Category
Article
ISSN
0148-639X

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✦ Synopsis

We studied the effects of transcranial motor cortex stimulation on the electromyographic characteristics of tremor in 9 patients with familial essential tremor and in 12 patients with postural tremor associated with Parkinson's disease. Transcranial magnetic stimulation reset both types of tremor equally. The resetting depended on the stimulus intensity, but was most closely correlated with the duration of the electromyographic silent period that followed the stimulus-induced motor evoked potential. Tremor resetting was present bilaterally even after focal, unilateral stimulation. Transcranial electrical stimulation failed to reset the tremor in either patient group. These results emphasize the role of central, intracortical structures in the generation of essential tremor and postural tremor in Parkinson's disease.

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