Effect of transcranial magnetic stimulation on bimanual movements

Journal of Neurophysiology
Jen-Tse ChenKwong-Kum Liao

Abstract

Transcranial magnetic stimulation (TMS) of the motor cortex can interrupt voluntary contralateral rhythmic limb movements. Using the method of "resetting index" (RI), our study investigated the TMS effect on different types of bimanual movements. Six normal subjects participated. For unimanual movement, each subject tapped either the right or left index finger at a comfortable rate. For bimanual movement, index fingers of both hands tapped in the same (in-phase) direction or in the opposite (antiphase) direction. TMS was applied to each hemisphere separately at various intensities from 0.5 to 1.5 times motor threshold (MT). TMS interruption of rhythm was quantified by RI. For the unimanual movements, TMS disrupted both contralateral and ipsilateral rhythmic hand movements, although the effect was much less in the ipsilateral hand. For the bimanual in-phase task, TMS could simultaneously reset the rhythmic movements of both hands, but the effect on the contralateral hand was less and the effect on the ipsilateral hand was more compared with the unimanual tasks. Similar effects were seen from right and left hemisphere stimulation. TMS had little effect on the bimanual antiphase task. The equal effect of right and left hemisphere ...Continue Reading

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Citations

Jun 23, 2010·Brain : a Journal of Neurology·Tao WuPiu Chan
Mar 26, 2016·Frontiers in Human Neuroscience·Yoshifumi NomuraKoichi Hiraoka
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Feb 13, 2021·Brain Stimulation·Marta BortolettoMarco Bove

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