METHOD FOR ESTIMATING NUMBER OF MOTOR UNITS IN THENAR MUSCLES AND CHANGES IN MOTOR UNIT COUNT WITH AGING
METHOD FOR ESTIMATING NUMBER OF MOTOR UNITS IN THENAR MUSCLES AND CHANGES IN MOTOR UNIT COUNT WITH AGING
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DOI：
10.1136/jnnp.35.6.845
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发表时间：
1972-01-01
影响因子：
11
通讯作者：
BROWN, WF
中科院分区：
文献类型：
--
作者：
BROWN, WF
描述了一种估计中位神经支配的鱼际肌运动单元数量的方法。在40岁以下的正常人中，平均值和1sd为253+34。运动单元的数量随着年龄的增长而下降，尤其是在中年之后，因此，尽管老年人的体力很好，但其数量往往不到年轻人的一半。病因尚不清楚，但可能包括周围神经损伤和“原发性神经元细胞死亡”。
A method for estimating the number of motor units in median innervated thenar muscles is described. In normal human subjects under 40 years of age, the mean and 1 SD was 253+34. The number of motor units falls with increasing age, especially after mid life, so that elderly subjects often have less than one-half the number in youth despite good strength. The cause is not known but probably includes peripheral nerve trauma and `primary neuronal cell death'.