运动神经元兴奋性降低引起的F波变化:一项睡眠研究。

T Ichikawa, T Yokota
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引用次数: 0

摘要

为了阐明运动神经元兴奋性变化对F波的影响,我们研究了9名正常受试者在清醒和睡眠状态下F波的持续时间、平均大小和最小潜伏期。通过刺激腕部正中神经,对短拇外展肌进行记录。睡眠期间F波的持续时间和大小明显减小,尤其是在REM阶段,大多数受试者在REM阶段的平均大小不到W阶段的5%,有一个受试者的F波完全消失。睡眠时的最小潜伏期比清醒时长。当持久性大于10%时,延长时间在2.0 ms以内。引起F波的运动神经元数量的减少可能是延长的主要原因。我们认为运动神经元兴奋性的降低可导致周围运动神经F波消失而无传导阻滞,并且F波延长超过2 ms可作为临床神经传导研究中近端传导延迟的标志。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
F wave change by decreased motoneuronal excitability: a sleep study.

To clarify the effect of the change in motoneuronal excitability on the F wave, we studied the persistence, mean size, and minimum latency of the F wave in nine normal subjects while awake and asleep. Recordings were made from the abductor pollicis brevis muscle by stimulating the median nerve at the wrist. The persistence and size of the F wave markedly decreased during sleep, especially in stage REM. The mean size in stage REM was less than 5% of that in stage W in most subjects, and the F wave entirely disappeared in one subject. The minimum latency during sleep was longer than during wakefulness. Prolongation was within 2.0 ms when the persistence was more than 10%. A decrease in the number of motoneurons that elicit the F wave may be the major cause of prolongation. We conclude that the decreased motoneuronal excitability can cause the F wave to disappear without conduction block in the peripheral motor nerve and that the prolongation of the F wave for more than 2 ms provides a marker for proximal conduction delay in the clinical nerve conduction studies.

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