F反应的特征：一项单运动单位研究。
Characteristics of the F response: a single motor unit study.
作者信息
Yates S K, Brown W F
出版信息
J Neurol Neurosurg Psychiatry. 1979 Feb;42(2):161-70. doi: 10.1136/jnnp.42.2.161.
Abstract
Trains of 100 to 200 stimuli result in F discharges from less than one half of motor units of hand muscles. The maximum observed F discharge frequency was 10%. There was no relation between the surface voltage of motor unit potentials and the frequency of F discharge. The motor unit potentials of larger surface voltage were recruited at higher stimulus intensity levels, usually supramaximal for the antidromic sensory nerve action potential. No correlation was observed between F latency and the surface voltage of the motor unit potentials. In only one pathological example was a clear interaction observed between the frequency of F discharge in motor unit potentials and the recruitment of other single motor unit potentials by increments in the stimulus intensity. The observations suggested that caution should be exercised before the F discharge is accepted as a method for measuring proximal conduction times in human motor nerves.
摘要
100至200次刺激的序列会导致手部肌肉不到一半的运动单位出现F波放电。观察到的最大F波放电频率为10%。运动单位电位的表面电压与F波放电频率之间没有关系。表面电压较大的运动单位电位在较高的刺激强度水平下被募集，通常是在反行感觉神经动作电位的超强刺激强度下。未观察到F波潜伏期与运动单位电位表面电压之间的相关性。仅在一个病理实例中，观察到运动单位电位中的F波放电频率与刺激强度增加时其他单个运动单位电位的募集之间存在明显的相互作用。这些观察结果表明，在将F波放电作为测量人类运动神经近端传导时间的方法之前应谨慎行事。
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