内在手部肌肉中运动单位数量指数和 MScanFit 运动单位数量估计的可重复性。
Reproducibility of motor unit number index and MScanFit motor unit number estimation across intrinsic hand muscles.
机构信息
Westmead Clinical School, University of Sydney, Westmead, New South Wales, Australia.
出版信息
Muscle Nerve. 2020 Aug;62(2):192-200. doi: 10.1002/mus.26839. Epub 2020 Feb 28.
INTRODUCTION
We sought to evaluate the reproducibility of the motor unit number index (MUNIX) and MScanFit motor unit number estimation (MScan) when recording was performed over intrinsic hand muscles.
METHODS
The compound muscle action potential (CMAP) amplitude, MUNIX, and MScan were measured from the abductor pollicis brevis (APB), first dorsal interosseous (FDI), and abductor digit minimi (ADM) muscles from 15 healthy volunteers on three different occasions.
RESULTS
The reproducibility of CMAP amplitudes was excellent, with intraclass correlation coefficients (ICC) of 0.86 (APB), 0.90 (FDI), and 0.96 (ADM). Motor unit number index (ICC 0.73, ICC 0.85, ICC 0.85) and MScan (ICC 0.86, ICC 0.83, ICC 0.81) were highly reproducible across the three muscles. There were no significant correlations between MUNIX and MScan coefficients of variation (CV) and CMAP amplitude CVs.
DISCUSSION
Reproducibility of MUNIX and MScan was not significantly different across the intrinsic hand muscles and was independent of CMAP amplitude variability.
简介
我们旨在评估在记录内在手部肌肉时，运动单位数量指数（MUNIX）和 MScanFit 运动单位数量估计（MScan）的可重复性。
方法
从 15 名健康志愿者的拇指外展短肌（APB）、第一背间骨间肌（FDI）和小指外展肌（ADM）中测量复合肌肉动作电位（CMAP）幅度、MUNIX 和 MScan。
结果
CMAP 幅度的可重复性极好，内类相关系数（ICC）为 0.86（APB）、0.90（FDI）和 0.96（ADM）。运动单位数量指数（ICC 0.73、ICC 0.85、ICC 0.85）和 MScan（ICC 0.86、ICC 0.83、ICC 0.81）在这三个肌肉中均具有高度可重复性。MUNIX 和 MScan 系数变化（CV）与 CMAP 幅度 CV 之间无显著相关性。
讨论
MUNIX 和 MScan 的可重复性在内在手部肌肉之间无显著差异，且独立于 CMAP 幅度的可变性。
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