日常生活中咀嚼肌活动的定量肌电图分析

A quantitative electromyographic analysis of masticatory muscle activity in usual daily life.

作者信息

Saifuddin M, Miyamoto K, Ueda H M, Shikata N, Tanne K

机构信息

Department of Orthodontics, Hiroshima University Faculty of Dentistry, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.

出版信息

Oral Dis. 2001 Mar;7(2):94-100.

PMID:11355445

Abstract

OBJECTIVE

This study was designed to investigate whether a quantitative electromyographic (EMG) analysis with a special reference to the EMG amplitude at 98N bite force could reduce the influence of electrode relocation and to examine the reproducibility of masticatory muscle activity in usual daily life within individuals.

SUBJECTS AND METHODS

In the first experiment, two sessions of surface EMG recording for masseter and anterior temporal muscles during tapping, and chewing gum and marshmallow were performed for 10 subjects with an interval of at least 1 week with electrode relocation. In the second experiment, two sessions of EMG recording during daytime (142 min, including mealtime) and sleep (142 min) were carried out for 10 subjects with an interval of at least 1 week. The average rectified EMG values were normalised with a special reference to the EMG amplitude induced by a 98N bite force.

RESULTS

In the first experiment, high correlation coefficients and no significant differences in the mean normalised values of muscle activity were found between two sessions. Although the average rectified values showed high correlation coefficients, the mean masseter muscle activity while chewing gum was significantly different between two sessions. In addition, the variation in temporal muscle activity between two sessions while chewing gum was significantly smaller in the normalised values than in the average rectified ones. In the second experiment, less intra-individual variation in the normalised values of masticatory muscle activity between two sessions indicated the reproducibility. Normalised masticatory muscle activity showed less variation during mealtimes than during usual daytime and sleep.

CONCLUSIONS

This quantitative EMG analysis could estimate the masticatory muscle activity by reducing the influences of electrode relocation, demonstrating an availability of this analysis for the evaluation of masticatory muscle activity in usual daily life.

摘要

目的

本研究旨在探讨一种定量肌电图（EMG）分析方法，特别关注98N咬合力时的EMG振幅，是否能减少电极重新放置的影响，并检验个体在日常生活中咀嚼肌活动的可重复性。

受试者与方法

在第一个实验中，对10名受试者在轻敲、咀嚼口香糖和棉花糖过程中进行了两次咬肌和颞前肌表面肌电图记录，两次记录间隔至少1周，且电极重新放置。在第二个实验中，对10名受试者在白天（142分钟，包括用餐时间）和睡眠（142分钟）期间进行了两次肌电图记录，两次记录间隔至少1周。平均整流肌电图值以98N咬合力诱发的EMG振幅为参照进行标准化。

结果

在第一个实验中，两次记录之间肌肉活动的平均标准化值具有高相关系数且无显著差异。尽管平均整流值显示出高相关系数，但两次记录之间咀嚼口香糖时咬肌的平均肌肉活动存在显著差异。此外，咀嚼口香糖时两次记录之间颞肌活动的变化在标准化值中比在平均整流值中显著更小。在第二个实验中，两次记录之间咀嚼肌活动标准化值的个体内差异较小，表明具有可重复性。标准化咀嚼肌活动在进餐时间的变化比在白天和睡眠期间更小。