外喉頭筋の音声生理学的研究
スポンサーリンク
概要
- 論文の詳細を見る
The role of the extrinsic laryngeal muscles in phonation was experimentally investigated on adult dogs. Phonation was artificially induced by blowing the air through the glottis while closing the glottis by delivering electrical stimuli to the laryngeal nerves. Changes in voice were evaluated using sound spectrograph when individual and/or assorted extrinsic laryngeal muscles were stimulated. As a result, the following conclusions were obtained. 1) Contraction of each individual muscle generally provided insignificant effect on voice. 2) Simultaneous assorted contractions of a selected muscle among the extrinsic laryngeal muscles with the cricopharyngeal muscle rose a pitch. 3) Simultaneous assorted contractions of a selected muscle with both the cricopharyngeal and cricothyroid muscles resulted in an obvious pitch rise. The mechanism of pitch rise by independent and combined contractions of the extrinsic laryngeal muscles was discussed and the role of the extrinsic laryngeal muscles in the phoniatric regulation of the larynx was stressed.
- 社団法人 日本耳鼻咽喉科学会の論文