Activation pattern masticatory muscles in dysphonics woman.

Electromyography and clinical neurophysiology Pub Date : 2010-09-01

D Rodrigues-Bigaton, A Schwarzenbeck, K C S Berni, R R J Guirro, K C A Silvério

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Abstract

Purpose: To evaluate the pattern of activation of the masticatory muscles in dysphonic women.

Methods: Seventeen women was divided into two groups: experimental group with 10 dysphonic women (33.6 +/- 8.0) and control group with 7 healthy women (25 +/- 5,19). The Electromyography exam of the left (LM) and right (RM) masseter muscles, anterior portion of the right (RT) and left (LT) temporal, and suprahyoid (SH) was performed by using electrodes of simple distinguishing surface.

Results: With the mandible postural position at rest, all the muscles presented increased electromyography activity compared to the control group (p < 0.05). As for the mandible elevator muscles, the RM experimental group presented significantly decreased electromyography activity (p < 0, 05) and the SH increased (p < 0.05) compared to the control group. For the rest of the muscles, there was no significantly difference between the groups. It was verified that the experimental group presented higher co-contraction of the mandible depressed muscles in relation to contraction of the RT LT, RM and LM, as compared to the control group (p < 0.05).

Conclusions: Dysphonic women present alteration of the activation patterns of the masticatory muscles.

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发音障碍女性咀嚼肌的激活模式。

目的:探讨发音障碍女性咀嚼肌的激活模式。方法:17例女性分为两组，实验组10例(33.6 +/- 8.0)，对照组7例(25 +/- 5,19)。采用简单区分面电极对左(LM)和右(RM)咬肌、右(RT)和左(LT)颞前部、舌骨上(SH)进行肌电图检查。结果:下颌骨体位静止时，各肌肉肌电活动均较对照组增加(p < 0.05)。对于下颌骨提升肌，RM实验组肌电活动显著低于对照组(p < 0.05)， SH显著高于对照组(p < 0.05)。对于其余的肌肉，两组之间没有显著差异。结果表明，实验组下颌骨下陷肌的共收缩高于对照组(p < 0.05)。结论:发音障碍女性咀嚼肌的激活模式发生改变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Electromyography and clinical neurophysiology

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