著者

粉川 信行

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.28, no.6, pp.323-332, 1977-12-10 (Released:2010-10-20)

参考文献数

18

被引用文献数

5 6

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Androgenic and anabolic hcrmones have often been used in treating various diseases. The treatment for dysphonia, one of their side effects, has not yet been ascertained. We have employed a new surgical procedure and have obtained successful results.It may be said that when the cricothyroid muscle is more dominant than the thyroarytenoid (TA) muscle, voice will be high-pitched.Based on this concept, a method of weakening the activity of the TA muscle was assumed to be effective for eliminating abncrmal high-pitched voice. Prior to clinical application, we designed electrophysiological and histochemical experiments.Using canine larynx, a portion of the terminal branch of the recurrent nerve in the TA muscle was severed by making an incision onto the vocal cord parallel to its free edge. By deepening the incision, evoked electromyographic activity was gradually decreased presumably due to reduction in action potentials of the muscle fibers to be picked up by the electrodes. Similar results were also obtained in chronic experiments using canine larynx.A histochemical study revealed that motor end-plates were remarkably degenerated one month after ncision. This finding would indicate that the incision has severed the branch in the TA muscle.This method have been successfully employed for 8 clinical cases. In this paper, the results were reported and descussed from the viewpoint of phoniatric examinations.

著者

福田 宏之 斎藤 成司 都築 達 牟田 弘 高山 悦代 藤岡 正 鈴木 理文 北原 哲 磯貝 豊 粉川 信行 市川 忠 牧野 克巳

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.2, pp.101-106, 1984-04-10 (Released:2010-02-22)

参考文献数

6

被引用文献数

4 3

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Nobody can deny that lubrication is one of the factors which influences the phonatory function of the larynx. However, no notable studies on the mechanism of lubrication have ever been carried out. This study is an effort to clarify how the larynx is lubricated.In the present study, it is revealed that the secretory fluid from the tracheal and subglottic spaces passes instantly through the glottis at the moment of the onset of phonation. Thus, the initiation of the lubrication is accomplished. The fluid from the subglottis is then mixed with the supraglottic fluid which comes mainly from the ventricular gland. A lubricant column is bilaterally made by the mixed fluid on the upper surface of the vocal folds. This lubricant column is rotating perpendicularilly to the free edge of the folds. The lubricant column may lubricate the folds which vibrate during phonation. At the end of phonation, the column decomposes and mostly flows backward to the subglottis. By this flow, the glottis is lubricated again.In this paper, the results mentioned above were discussed and analyzed from the viewpoint of phonodynamics.