Muscle fiber conduction velocity changes with length
Muscle fiber conduction velocity changes with length
复制标题
肌纤维传导速度随长度变化
DOI：
10.1002/mus.880160512
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发表时间：
1993
期刊：
影响因子：
3.4
通讯作者：
J. Trontelj
中科院分区：
文献类型：
--
作者：
J. Trontelj
在通过单纤维肌电图（SFEMG）记录单个肌纤维的活动时，通过其轴突或直接刺激，通过操纵记录针或被动关节运动来改变记录的肌纤维的长度-拉伸或缩短。这导致潜伏期的显着变化，相应的传播速度的增加，缩短的肌肉纤维和减缓其延长。速度的最大增加估计为33%，并减缓至约22%。肌纤维传播速度的这些长度依赖性变化被认为有助于传播速度恢复功能的超常阶段，并负责肌源性的，放电间隔依赖性的，抖动的重要部分。© 1993 John Wiley & Soncs，Inc.
While recording activity from individual muscle fibers by single fiber EMG (SFEMG), stimulated either through their axons or directly, the length of the recorded muscle fiber was changed—stretched or made shorter—by manipulating the recording needle or by passive joint movements. This resulted in significant changes of latency corresponding to an increase in propagation velocity on shortening of the muscle fiber and to a slowing of its lengthening. The maximum increase in velocity was estimated to 33% and slowing to about 22%. These lengthdependent changes of muscle fiber propagation velocity are suggested to contribute to the supernormal phase of propagation velocity recovery function and to be responsible for an important part of the myogenic, interdischarge interval‐dependent, jitter. © 1993 John Wiley & Soncs, Inc.