Time-series changes in intramuscular coherence associated with split-belt treadmill adaptation in humans
Time-series changes in intramuscular coherence associated with split-belt treadmill adaptation in humans
复制标题
与人类分带式跑步机适应相关的肌内一致性的时间序列变化
DOI：
10.1007/s00221-021-06127-3
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发表时间：
2021
影响因子：
2
通讯作者：
Kamibayashi Kiyotaka
中科院分区：
文献类型：
--
作者：
Oshima Atsushi;Wakahara Taku;Nakamura Yasuo;Tsujiuchi Nobutaka;Kamibayashi Kiyotaka
人类可以灵活地改变自己的行走模式。分体式跑步机已被广泛用于运动适应研究。虽然以前的研究已经详细地研究了劈带行走过程中和之后行走时空特征的时间序列变化，但还不清楚劈带行走过程中和之后肌肉内连贯性是如何变化的。因此，我们通过使用成对肌电(EMG)信号的相干分析，研究了与劈裂腰带运动适应相关的踝背屈肌肌肉内连贯性的时间序列变化。12名健康的男性在分裂带跑步机上行走。记录双腿胫骨前肌(TA)两部分的表面肌电信号以计算肌内连贯性。在劈腿行走过程中，慢腿的贝塔和伽马频段的每个肌肉内连贯性区域逐渐减少。与开始劈带行走后的第一分钟相比，从7分钟开始观察到该区域的显著差异。同时，劈带行走后第一分钟快腿β带和伽马频段的相干面积较劈带行走前显著增加，随后立即恢复到正常步行水平。这些结果表明，当从正常步行模式适应到新的步行模式时，皮质参与TA肌肉活动的能力逐渐减弱。另一方面，当从新适应的行走模式重新适应到正常的行走模式时，皮质参与可能会暂时加强，然后迅速减弱。
Humans can flexibly modify their walking patterns. A split-belt treadmill has been widely used to study locomotor adaptation. Although previous studies have examined in detail the time-series changes in the spatiotemporal characteristics of walking during and after split-belt walking, it is not clear how intramuscular coherence changes during and after split-belt walking. We thus investigated the time-series changes of intramuscular coherence in the ankle dorsiflexor muscle associated with split-belt locomotor adaptation by coherence analysis using paired electromyography (EMG) signals. Twelve healthy males walked on a split-belt treadmill. Surface EMG signals were recorded from two parts of the tibialis anterior (TA) muscle in both legs to calculate intramuscular coherence. Each area of intramuscular coherence in the beta and gamma bands in the slow leg gradually decreased during split-belt walking. Significant differences in the area were observed from 7 min compared to the first minute after the start of split-belt walking. Meanwhile, the area of coherence in both beta and gamma bands in the fast leg for the first minute of normal walking following split-belt walking was significantly increased compared with normal walking before split-belt walking, and then immediately returned to the normal walking level. These results suggest that cortical involvement in TA muscle activity gradually weakens when adapting from a normal walking pattern to a new walking pattern. On the other hand, when re-adapting from the newly adapted walking pattern to the normal walking pattern, cortical involvement might strengthen temporally and then weaken quickly.
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影响因子：
2.5
作者：
Halliday, DM;Conway, BA;Nielsen, JB
通讯作者：
Nielsen, JB
影响因子：
2.5
作者：
Hansen, NL;Conway, BA;Nielsen, JB
通讯作者：
Nielsen, JB
影响因子：
4.7
作者：
Nielsen, J. B.;Brittain, J. -S.;Conway, B. A.
通讯作者：
Conway, B. A.
影响因子：
5.3
作者：
Frigon, Alain;Hurteau, Marie-France;D'Angelo, Giuseppe
通讯作者：
D'Angelo, Giuseppe
研究人类自愿等长收缩过程中运动神经元常见突触输入的频率内容。
DOI：
--
发表时间：
1993
期刊：
Journal of Physiology
影响因子：
--
作者：
S. Farmer;F. Bremner;D. Halliday;J. Rosenberg;J. Stephens
通讯作者：
J. Stephens