The effects of transcranial static magnetic fields stimulation over the supplementary motor area on anticipatory postural adjustments

Tsuru Daisuke

Watanabe Tatsunori

Chen Xiaoxiao

Kubo Nami

Sunagawa Toru

Mima Tatsuya

Kirimoto Hikari

Neuroscience Letters

We investigated the influence of transcranial static magnetic field stimulation (tSMS) over the supplementary motor area (SMA) on anticipatory postural adjustments (APAs), in which the activation of the postural muscles of the legs and trunk that control standing posture precedes the activation of the prime mover muscles during rapid shoulder flexion movement. Eighteen subjects performed a self-paced rapid shoulder flexion task before, during, and after tSMS. Electromyogram (EMG) activity was recorded from the deltoid anterior (AD) as the prime mover muscle and the biceps femoris (BF) as the postural muscle during the task. The EMG latency difference (ΔEMG onset) between the two muscles was calculated by subtracting the EMG burst onset of the BF from that of the AD. The ΔEMG onset was significantly shortened, but center-of-pressure parameters were not affected after tSMS stimulation. These findings suggest that tSMS applied over the SMA could inhibitively modulate APAs function.

Transcranial static magnetic stimulation

Non-invasive brain stimulation

Supplementary motor area

Anticipatory postural adjustments

eng

Elsevier

© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。

[ISSN] 0304-3940

[DOI] 10.1016/j.neulet.2020.134863

[PMID] 32105767

[DOI] https://doi.org/10.1016/j.neulet.2020.134863