Spasticity, weakness, force variability, and sustained spontaneous motor unit discharges of resting spastic-paretic biceps brachii muscles in chronic stroke.
Spasticity, weakness, force variability, and sustained spontaneous motor unit discharges of resting spastic-paretic biceps brachii muscles in chronic stroke.
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DOI：
10.1002/mus.23699
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发表时间：
2013-07
期刊：
影响因子：
3.4
通讯作者：
Li, Sheng
中科院分区：
文献类型：
--
作者：
Chang, Shuo-Hsiu;Francisco, Gerard E.;Zhou, Ping;Rymer, W. Zev;Li, Sheng
关键词：
本研究旨在探讨慢性中风患者痉挛-麻痹肱二头肌的痉挛状态、无力、力量变异性和持续性自发运动单位放电之间的关系。10名慢性卒中受试者在受损和非受损侧产生次最大等长肘关节屈曲力。从肱二头肌和肱三头肌记录肌内EMG（iEMG）。我们观察到持续的自发运动单位放电在静息二头肌iEMG。自发放电增加自愿激活后，只有受损的一面。患侧的等长肌力有较大的匹配误差和波动。自发放电在功能上与痉挛状态、力量变异性或虚弱无关。然而，受损侧的力量越大，力的变异性越小。在慢性中风患者中，无力而非痉挛状态是影响非痉挛性肱二头肌随意力量控制的主要因素。
The purpose was to examine relations among spasticity, weakness, force variability, and sustained spontaneous motor unit discharges in spastic-paretic biceps brachii muscles in chronic stroke. Ten chronic stroke subjects produced submaximal isometric elbow flexion force on impaired and non-impaired sides. Intramuscular EMG (iEMG) was recorded from biceps and triceps brachii muscles. We observed sustained spontaneous motor unit discharges in the resting biceps on iEMG. Spontaneous discharges increased after voluntary activation only on the impaired side. The impaired side had greater matching errors and greater fluctuations in isometric force. Spontaneous discharges were not functionally related to spasticity, force variability, or weakness. However, greater strength on the impaired side correlated with less force variability. Weakness rather than spasticity is a main factor interfering with voluntary force control in paretic-spastic biceps brachii muscles in chronic stroke.
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影响因子：
3.4
作者：
Kallenberg, Laura A. C.;Hermens, Hermie J.
通讯作者：
Hermens, Hermie J.
影响因子：
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作者：
Zhou, Ping;Suresh, Nina L.;Rymer, William Z.
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DOI：
10.1016/j.apmr.2006.05.013
发表时间：
2006-09-01
影响因子：
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作者：
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DOI：
10.1093/brain/awl002
发表时间：
2006-03
期刊：
Brain : a journal of neurology
影响因子：
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作者：
Ward NS;Newton JM;Swayne OB;Lee L;Thompson AJ;Greenwood RJ;Rothwell JC;Frackowiak RS
通讯作者：
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影响因子：
2.5
作者：
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通讯作者：
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