Hocevar-Boltezar I, Janko M, Zargi M
Department of Otorhinolaryngology and Cervicofacial Surgery, Ljubljana, Slovenia.
Acta Otolaryngol. 1998 Sep;118(5):739-43. doi: 10.1080/00016489850183287.
In muscle tension dysphonia (MTD) excessive tension of both the internal and external laryngeal muscles is observed. In the present pilot study, 9 pairs of surface electrodes were used to determine the electromyographic (EMG) characteristics of different muscles in the perioral area and anterior neck before and during phonation. Eleven patients with MTD and 5 normal speakers were included within the study. The results show a 6-8-fold increase of EMG activity and/or an alternation of the EMG activity level in the perioral and supralaryngeal muscles before and during phonation in most of the patients with MTD. It is not clear whether these muscles are activated as compensation for excessive tension of internal laryngeal muscles, or whether they are responsible for some of the voice disorders.
在肌肉紧张性发声障碍（MTD）中，可观察到喉内肌和喉外肌均存在过度紧张。在本初步研究中，使用9对表面电极来确定发声前和发声过程中口周区域和颈前部不同肌肉的肌电图（EMG）特征。该研究纳入了11名MTD患者和5名正常说话者。结果显示，大多数MTD患者在发声前和发声过程中，口周肌和喉上肌的肌电活动增加了6至8倍和/或肌电活动水平发生了改变。目前尚不清楚这些肌肉的激活是作为对喉内肌过度紧张的代偿，还是它们本身导致了一些嗓音障碍。
