超声和肌电图测定的肌肉收缩起始差异。

Differences in muscle contraction onset as determined by ultrasound and electromyography.

机构信息

United States Army Research Laboratory, Human Research and Engineering Directorate, 459 Mulberry Point Road, Aberdeen Proving Ground, Maryland, USA.

United States Army Research Laboratory, Human Research and Engineering Directorate, Research Triangle Park, North Carolina, USA.

出版信息

Muscle Nerve. 2019 Apr;59(4):494-500. doi: 10.1002/mus.26395. Epub 2019 Jan 6.

DOI:10.1002/mus.26395

PMID:30536792

Abstract

INTRODUCTION

We characterize the agreement between the timing of muscle contraction onset detected by surface electromyography (sEMG), fine wire EMG (fwEMG), and motion-mode (M-mode) ultrasound for improved interpretations of clinical outcomes.

METHODS

Eighteen healthy adults participated. Differences in contraction onset were compared between sEMG, fwEMG, and M-mode ultrasound collected during concentric contractions of the vastus lateralis and biceps brachii.

RESULTS

The mean difference of 13.1 ms (-33.3-59.9) between sEMG and fwEMG was non-significant (intraclass correlation [ICC] = 0.60). Ultrasound was significantly different from surface and fine wire EMG (ICC = 0.65 and ICC = 0.40, respectively), occurring 98.6 ms (72.3-124.9) and 111.7 (60.3-163.0) before sEMG and fwEMG, respectively. Nonparametric interquartile ranges were also wide.

CONCLUSIONS

Due to high variability, comparisons between EMG methods should be interpreted with caution. Ultrasound detected onset before either EMG method, which may indicate motion from adjacent muscles during voluntary contractions. Muscle Nerve 59:494-500, 2019.

摘要

简介

我们描述了表面肌电图（sEMG）、细针肌电图（fwEMG）和运动模式（M 模式）超声检测到的肌肉收缩起始时间之间的一致性，以改善对临床结果的解释。

方法

18 名健康成年人参与了这项研究。在股外侧肌和肱二头肌的向心收缩过程中，比较了 sEMG、fwEMG 和 M 模式超声检测到的收缩起始时间的差异。

结果

sEMG 和 fwEMG 之间的平均差异为 13.1ms（-33.3-59.9），无统计学意义（组内相关系数 [ICC] = 0.60）。超声与表面肌电图和细针肌电图明显不同（ICC = 0.65 和 ICC = 0.40），分别比 sEMG 和 fwEMG 提前 98.6ms（72.3-124.9）和 111.7ms（60.3-163.0）。非参数四分位间距也很宽。