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首页> 外文期刊>The Laryngoscope: A Medical Journal for Clinical and Research Contributions in Otolaryngology, Head and Neck Medicine and Surgery, Facial Plastic and Reconstructive Surgery .. >Physiologic features of vocal fatigue: electromyographic spectral-compression in laryngeal muscles.
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Physiologic features of vocal fatigue: electromyographic spectral-compression in laryngeal muscles.

机译：声音疲劳的生理特征：喉肌的肌电图频谱压缩。

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摘要

OBJECTIVES: This study addresses the problem of defining observable attributes of "vocal fatigue" as a physiologic condition. The aim was to determine the applicability of electromyography (EMG) spectral compression in observing fatigue in laryngeal muscles arising from prolonged vocal effort. STUDY DESIGN: Single institution, nonrandomized, prospective analysis of subjects evaluated in an academic, tertiary care center. METHODS: In adapting EMG techniques, we report pretest observations that bear on the choice of voicing tasks serving to induce and estimate muscle fatigue and the selection of muscles that are particularly involved in effortful vocalization. On this basis, an experiment was designed where intramuscular EMG was used to record lateral cricoarytenoid potentials of seven subjects at regular intervals across a 12 to 14 hour period (50 samples per subject). Between each of these samples, the participants were required to produce loud speech for 3 minutes with peaks of 74 dBA at 1 meter. RESULTS: The results show fatigue-related spectral compression for all subjects and nonlinear changes across time indicating critical values beyond which fatigue is persistent. CONCLUSION: Spectral compression appears to present a robust attribute of fatigue-related changes in muscles involved in vocalization. There are several implications with respect to research on the prevention of acquired voice pathologies.
机译：目的：本研究解决了将“声音疲劳”的可观察属性定义为生理状况的问题。目的是确定肌电描记法（EMG）频谱压缩在观察声带长时间引起的喉部肌肉疲劳中的适用性。研究设计：在学术，三级护理中心评估的受试者的单一机构，非随机，前瞻性分析。方法：在采用EMG技术时，我们报告了预测试的观察结果，这些观察结果涉及选择用于诱发和估计肌肉疲劳的发声任务，以及特别参与发声的肌肉选择。在此基础上，设计了一个实验，其中肌内肌电图用于在12到14个小时内以规则的间隔记录7位受试者的横向环缝ary骨电位（每位受试者50个样本）。在这些样本中的每一个之间，要求参与者发出响亮的语音3分钟，并在1米处产生74 dBA的峰值。结果：结果显示所有受试者的疲劳相关频谱压缩以及随时间的非线性变化，表明超过临界值后疲劳持续存在。结论：频谱压缩似乎表现出与发声有关的肌肉疲劳相关变化的强大属性。关于预防后天性语音病理的研究有几个含义。

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