人体肌肉中的快肌纤维和慢肌纤维单位。
Fast and slow twitch units in a human muscle.
作者信息
Sica R E, McComas A J
出版信息
J Neurol Neurosurg Psychiatry. 1971 Apr;34(2):113-20. doi: 10.1136/jnnp.34.2.113.
Abstract
A study has been made of the isometric twitches of single motor units in the extensor hallucis brevis (EHB) muscle in man. The twitch contraction times ranged from 35 to 98 msec and the pooled results indicated the presence of at least two types of unit. The recorded twitch tensions also varied considerably (from 2 to 14 g) but were not related to the twitch speeds. The twitch tension developed by the whole EHB muscle depended on the initial length of the muscle and on the age of the subject. The EHB muscle was estimated to contain approximately 56 motor units.
摘要
对人体拇短伸肌（EHB）中单个运动单位的等长收缩进行了研究。收缩时间范围为35至98毫秒，汇总结果表明至少存在两种类型的运动单位。记录的收缩张力也有很大差异（从2克到14克），但与收缩速度无关。整个拇短伸肌产生的收缩张力取决于肌肉的初始长度和受试者的年龄。估计拇短伸肌约包含56个运动单位。
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