著者

田中 信三 窪田 清己 田辺 正博

出版者

The Japan Broncho-esophagological Society

雑誌

日本気管食道科学会会報 (ISSN:00290645)

巻号頁・発行日

vol.35, no.4, pp.287-292, 1984-08-10 (Released:2010-02-22)

参考文献数

9

---

Living canine larynx was blown through the trachea with both arytenoid cartilages fixed in the median position. The sound pressure level and fundamental frequency of the voice were measured under various flow rates and subglottal pressures, with and without electric stimulation of the thyroarytenoid muscles. From this experiment, the role of the thyroarytenoid muscles in voice regulation was found to be as follows:1) When the glottis is sufficiently closed, contraction of the thyroarytenoid muscles does not affect the relationship between aerodynamic power (flow rate times pressure) and the sound pressure level, in spite of increased glottal resistance (pressure divided by flow rate).2) When the glottis is sufficiently closed, contraction of the thyroarytenoid muscles decreases the fundamental frequency in relatively large aerodynamic powers.