MYOELECTRIC SIGNAL CONDUCTION-VELOCITY AND SPECTRAL PARAMETERS - INFLUENCE OF FORCE AND TIME
MYOELECTRIC SIGNAL CONDUCTION-VELOCITY AND SPECTRAL PARAMETERS - INFLUENCE OF FORCE AND TIME
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DOI：
10.1152/jappl.1985.58.5.1428
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发表时间：
1985-01-01
影响因子：
3.3
通讯作者：
DE LUCA, CJ
中科院分区：
文献类型：
--
作者：
BROMAN, H;BILOTTO, G;DE LUCA, CJ
关于人体肌纤维传导速度测量的报道很少。从肌电频谱参数的行为推断传导速度的行为。介绍了在不同肌肉收缩水平和持续收缩期间和之后研究的传导速度和频谱参数的信息。测量胫骨前肌。传导速度与肢体周长和肌肉力量输出呈正相关。高阈值运动单位的肌纤维直径平均大于低阈值运动单位的肌纤维直径。在强烈收缩过程中，传导速度持续下降，各种肌电频谱参数也是如此。然而，频谱参数下降约两倍的传导速度。在高水平收缩期间，除了沿着肌纤维沿着的传导速度之外的因素影响肌电信号。这些其他因素与个体运动单位的放电统计数据的变化以及不同运动单位放电之间的相关性有关。
Reports on measurement of muscle fiber conduction velocity in humans are scarce. Inferences on the behavior of conduction velocity were drawn from the behavior of myoelectric spectral parameters. Information on conduction velocity and spectral parameters studied at various muscle contraction levels and during and after sustained contractions was presented. The tibialis anterior muscle was measured. Conduction velocity demonstrated a positive correlation with limb circumference and with muscle force output. The diameters of the muscle fibers of high-threshold motor units are, on an average, larger than those of low-threshold motor units. Conduction velocity consistently decreased during a strong contraction as did various myoelectric spectral parameters. However, the spectral parameters decreased approximately twice as much as did the conduction velocity. Factors other than the conduction velocity along the muscle fibers affect the myoelectric signal during a high-level contraction. These other factors appertain to changes in the firing statistics of individual motor units as well as the correlation between the firings of different motor units.