人类眨眼反射中单个运动单位的募集。

Recruitment of single motor units in the human blink reflex.

作者信息

Dengler R, Rechl F, Struppler A

出版信息

Neurosci Lett. 1982 Dec 31;34(3):301-5. doi: 10.1016/0304-3940(82)90192-6.

Abstract

The recruitment of single motor units (MU) in the early (R1) and late (R2) components of the electrically evoked human blink reflex (BR) was studied using bipolar needle electrodes with a limited take-off area. It could be shown that the same MUs can discharge in R1 and R2 of a BR as well as during voluntary eyelid contraction. At repetitive stimulation (1 Hz), facilitation of MU discharges in R1 and habituation in R2 became apparent. The visible reflex eyelid contraction may mainly be due to repetitive MU discharges in R2. The discharges of the same MUs in R1, however, contribute to it and shorten the latency between stimulus and reflex response.

摘要

使用具有有限引出面积的双极针电极，研究了电诱发人眨眼反射（BR）早期成分（R1）和晚期成分（R2）中单个运动单位（MU）的募集情况。结果表明，同一运动单位可在眨眼反射的R1和R2以及自主眼睑收缩期间放电。在重复刺激（1赫兹）时，R1中运动单位放电的易化和R2中的习惯化变得明显。可见的反射性眼睑收缩可能主要归因于R2中运动单位的重复放电。然而，R1中同一运动单位的放电也对此有贡献，并缩短了刺激与反射反应之间的潜伏期。