经单块肌肉神经肌肉电刺激后协同肌活动的改变。
Alteration of synergistic muscle activity following neuromuscular electrical stimulation of one muscle.
机构信息
Institute of Sportscience, Friedrich-Schiller-University Seidelstraße 20, 07749, Jena, Germany.
出版信息
Brain Behav. 2012 Sep;2(5):640-6. doi: 10.1002/brb3.87. Epub 2012 Aug 24.
The aim of the study was to determine muscle activation of the m. triceps surae during maximal voluntary contractions (MVCs) following neuromuscular electrical stimulation (NMES) of the m. gastrocnemius lateralis (GL). The participants (n = 10) performed three MVC during pretest, posttest, and recovery, respectively. Subsequent to the pretest, the GL was stimulated by NMES. During MVC, force and surface electromyography (EMG) of the GL, m. gastrocnemius medialis (GM), and m. soleus (SOL) were measured. NMES of GL induced no significant decline (3%) in force. EMG activity of the GL decreased significantly to 81% (P < 0.05), whereas EMG activity of the synergistic SOL increased to 112% (P < 0.01). The GM (103%, P = 1.00) remained unaltered. Decreased EMG activity in the GL was most likely caused by failure of the electrical propagation at its muscle fiber membrane. The decline of EMG activity in GL was compensated by increased EMG activity of SOL during MVC. It is suggested that these compensatory effects are caused by central contributions induced by NMES.
本研究旨在确定在外侧腓肠肌（GL）接受神经肌肉电刺激（NMES）后，最大随意收缩（MVC）期间比目鱼肌（m. triceps surae）的肌肉激活情况。参与者（n=10）分别在预测试、后测试和恢复期间进行了三次 MVC。在预测试之后，GL 通过 NMES 进行刺激。在 MVC 期间，测量 GL、内侧腓肠肌（GM）和比目鱼肌（SOL）的力和表面肌电图（EMG）。GL 的 NMES 没有导致力量显著下降（3%）。GL 的 EMG 活动显著下降至 81%（P<0.05），而协同的 SOL 的 EMG 活动增加至 112%（P<0.01）。GM（103%，P=1.00）保持不变。GL 中的 EMG 活动减少很可能是由于其肌纤维膜的电传播失败所致。在 MVC 期间，SOL 的 EMG 活动增加补偿了 GL 中 EMG 活动的减少。这表明这些代偿效应是 NMES 引起的中枢贡献所致。
Zotero 插件