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Journal of the Korean Academy of Rehabilitation Medicine 1996;20(3):24.
A Study of Silent Periods Following Transcranial Magnetic Stimulation in Healthy Adults
Min Soo Kim, M.D., Won Ho Yang, M.D. , Byung Gwon Park, M.D.
Department of Rehabilitation Medicine, Chosun University Collage of Medicine
건강한 성인에서 두부 자기자극에 의한 Silent Period 검사
김민수, 양원호, 박병권
조선대학교 의과대학 재활의학교실

Transcranial magnetic stimulation of human motor cortex during voluntary muscle contraction produces motor evoked potentials followed by a transient electromyographic silent period(SP). SP has been known to `inhibitory' effects of cortical activity.

We evaluated SP in abductor pollicis brevis muscle in 21 healthy adults(male: 11, female: 10) who have no neurological signs and symptoms.

SP in relation to sex, recording site (right-left difference), height, magnetic stimulation intensity, and voluntary muscle contraction were studied.

We concluded as follows

1) The SP of male subjects was significantly longer than that of female subjects.

2) There was no significant difference of SP according to recording site and height.

3) The SP was significantly prolongated with increasing magnetic stimulation intensity.

4) There was no significant difference of SP duration between maximal and submaximal voluntary muscle contraction.

Key Words: Transcranial magnetic stimulation, Silent period


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