Otsuka Ryohei, Sasaki Ryoki, Tsuiki Shota, Kojima Sho, Onishi Hideaki
Department of Physical Therapy, Niigata University of Health and Welfare, Niigata-City, Japan.
Graduate School of Health and Welfare, Niigata University of Health and Welfare, Niigata-City, Japan; Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata-City, Japan.
Neurosci Lett. 2017 Aug 24;656:89-93. doi: 10.1016/j.neulet.2017.07.030. Epub 2017 Jul 19.
This study aimed to clarify the influence of range of repetitive passive finger movement on corticospinal excitability. Thirteen healthy subjects participated in this study. Passive index finger adduction-abduction movements were performed from 15° abduction to 15° adduction, 15° abduction to 0°, 0° to 15° adduction, and 15° adduction to 30° adduction, each at 15°/s for 10min on separate days. Motor evoked potentials (MEPs) elicited by transcranial magnetic stimulation and M- and F-waves were measured before and after each repetitive passive index finger movement protocol to evaluate changes in corticospinal excitability. MEP amplitude significantly decreased after all passive movements, while F-wave amplitude, F-wave persistence, and M-wave amplitude remained stable. These results suggest that cortical excitability decreases after repetitive passive movement. However, the range of repetitive passive movement does not markedly influence the magnitude of cortical depression.
本研究旨在阐明重复性被动手指运动范围对皮质脊髓兴奋性的影响。13名健康受试者参与了本研究。分别在不同日期以15°/秒的速度进行10分钟的被动示指内收-外展运动，运动范围包括从外展15°至内收15°、从外展15°至0°、从0°至内收15°以及从内收15°至内收30°。在每次重复性被动示指运动方案前后，测量经颅磁刺激诱发的运动诱发电位（MEP）以及M波和F波，以评估皮质脊髓兴奋性的变化。所有被动运动后MEP波幅均显著降低，而F波波幅、F波持续时间和M波波幅保持稳定。这些结果表明，重复性被动运动后皮质兴奋性降低。然而，重复性被动运动的范围并未显著影响皮质抑制的程度。
