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Transcranial static magnetic stimulation over the motor cortex can facilitate the contralateral cortical excitability in human

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Title: Transcranial static magnetic stimulation over the motor cortex can facilitate the contralateral cortical excitability in human
Authors: Takamatsu, Yasuyuki Browse this author →KAKEN DB
Koganemaru, Satoko Browse this author
Watanabe, Tatsunori Browse this author
Shibata, Sumiya Browse this author
Yukawa, Yoshihiro Browse this author
Minakuchi, Masatoshi Browse this author
Shimomura, Ryota Browse this author
Mima, Tatsuya Browse this author
Issue Date: 8-Mar-2021
Publisher: Nature Research
Journal Title: Scientific reports
Volume: 11
Issue: 1
Start Page: 5370
Publisher DOI: 10.1038/s41598-021-84823-4
Abstract: Transcranial static magnetic stimulation (tSMS) has been focused as a new non-invasive brain stimulation, which can suppress the human cortical excitability just below the magnet. However, the non-regional effects of tSMS via brain network have been rarely studied so far. We investigated whether tSMS over the left primary motor cortex (M1) can facilitate the right M1 in healthy subjects, based on the hypothesis that the functional suppression of M1 can cause the paradoxical functional facilitation of the contralateral M1 via the reduction of interhemispheric inhibition (IHI) between the bilateral M1. This study was double-blind crossover trial. We measured the corticospinal excitability in both M1 and IHI from the left to right M1 by recording motor evoked potentials from first dorsal interosseous muscles using single-pulse and paired-pulse transcranial magnetic stimulation before and after the tSMS intervention for 30 min. We found that the corticospinal excitability of the left M1 decreased, while that of the right M1 increased after tSMS. Moreover, the evaluation of IHI revealed the reduced inhibition from the left to the right M1. Our findings provide new insights on the mechanistic understanding of neuromodulatory effects of tSMS in human.
Type: article
Appears in Collections:保健科学院・保健科学研究院 (Graduate School of Health Sciences / Faculty of Health Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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