THE ROLE OF THE THYROARYTENOID MUSCLE IN REGULATING GLOTTAL AIRFLOW AND GLOTTAL CLOSURE IN AN IN VIVO CANINE LARYNX MODEL.
THE ROLE OF THE THYROARYTENOID MUSCLE IN REGULATING GLOTTAL AIRFLOW AND GLOTTAL CLOSURE IN AN IN VIVO CANINE LARYNX MODEL.
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DOI：
10.1121/2.0001504
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
Georg Luegmair;D. Chhetri;Zhaoyan Zhang
中科院分区：
文献类型：
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作者：
Georg Luegmair;D. Chhetri;Zhaoyan Zhang
本研究探讨了在体犬喉模型中个体喉肌在发声过程中调节平均声门流量和声门闭合模式的有效性。参数刺激甲杓肌（TA）、环杓外侧肌（LCA）、杓间肌（IA）和环甲肌（CT）进行发声实验。对于每个刺激水平，声门下压逐渐增加，以产生发声。从上级角度测量声门下压、声流量和外界声压，同时高速记录声带振动。结果表明，在发声过程中，TA肌在调节膜性声门宽度和声门闭合模式中起主导作用，表明TA肌在调节嗓音质量中起重要作用。TA肌肉的激活也是最有效的调节平均声门流量，因此一个重要的喉调节气流保护，特别是在高声门下压力或大声生产，虽然增加TA激活降低了声音强度。本研究还提供了一套完整的肌肉控制声门宽度和声音产生的数据，可以用于验证声带姿态和声音产生的计算模型。
This study investigated the effectiveness of individual laryngeal muscles in regulating the mean glottal flow and glottal closure pattern during phonation in an in vivo canine larynx model. Phonation experiments were performed with parametric stimulation of the thyroarytenoid (TA), lateral cricoarytenoid (LCA), interarytenoid (IA), and the cricothyroid (CT) muscles. For each stimulation level, the subglottal pressure was gradually increased to produce phonation. The subglottal pressure, the volume flow, and the outside acoustic pressure were measured together with high-speed recording of vocal fold vibration from a superior view. The results show that the TA muscle played a dominant role in regulating both the membranous glottal width and the glottal closure pattern during phonation, indicating an important role of the TA muscle in regulating voice quality. The TA muscle activation was also the most effective in regulating the mean glottal flow, and thus an important laryngeal adjustment in airflow conservation, particularly at high subglottal pressures or loud voice production, although increasing TA activation decreased the vocal intensity. This study also presented a complete set of data on muscular control of the glottal width and voice production, which can be used in validation of computational models of vocal fold posturing and voice production.