H‐reflexes reduce fatigue of evoked contractions after spinal cord injury
H‐reflexes reduce fatigue of evoked contractions after spinal cord injury
复制标题
H 反射可减轻脊髓损伤后诱发收缩的疲劳
DOI：
10.1002/mus.24144
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发表时间：
2014
期刊：
影响因子：
3.4
通讯作者：
D. F. Collins
中科院分区：
文献类型：
--
作者：
A. Bergquist;M. Wiest;Y. Okuma;D. F. Collins
导言：肌腹上的神经肌肉电刺激(NMES)主要通过M波产生收缩，而神经干上的NMES(NNMES)在神经学上完好无损的人中可以通过H反射产生收缩。我们测试了mNMES和nNMES在慢性运动完全性脊髓损伤患者中是否存在差异，如果是，它们是否会影响收缩疲劳。方法：记录8名受试者的足底屈曲扭矩和比目鱼肌肌电。疲劳方案使用mNMES和nNMES在不同的日期交付。结果：nNMES产生的收缩疲劳程度低于mNMES。当nNMES产生收缩时，扭矩减少最少，至少部分是通过H反射(n = 4参与者；减少39%)，而当通过M波产生收缩时，扭矩减少最多，而不考虑NMES部位(nNMES减少71%，n = 4；mNMES，减少73%，n = 8)。结论：nNMES产生的收缩疲劳程度低于mNMES，但仅当H反射参与诱发收缩时。肌肉神经50：224-234,2014
Introduction: Neuromuscular electrical stimulation (NMES) over a muscle belly (mNMES) generates contractions predominantly through M‐waves, while NMES over a nerve trunk (nNMES) can generate contractions through H‐reflexes in people who are neurologically intact. We tested whether the differences between mNMES and nNMES are present in people with chronic motor‐complete spinal cord injury and, if so, whether they influence contraction fatigue. Methods: Plantar‐flexion torque and soleus electromyography were recorded from 8 participants. Fatigue protocols were delivered using mNMES and nNMES on separate days. Results: nNMES generated contractions that fatigued less than mNMES. Torque decreased the least when nNMES generated contractions, at least partly through H‐reflexes (n = 4 participants; 39% decrease), and torque decreased the most when contractions were generated through M‐waves, regardless of NMES site (nNMES 71% decrease, n = 4; mNMES, 73% decrease, n = 8). Conclusions: nNMES generates contractions that fatigue less than mNMES, but only when H‐reflexes contribute to the evoked contractions. Muscle Nerve 50:224–234, 2014
脊髓损伤患者在功能性神经肌肉刺激的帮助下站立的替代足部放置。
影响因子：
2.4
作者：
Gillette,JasonC;Stevermer,CatherineA;Quick,NancyE;Abbas,JamesJ
通讯作者：
Abbas,JamesJ