著者

中村 明正

出版者

Japanese Society of Otorhinolaryngology-Head and neck surgery

雑誌

日本耳鼻咽喉科学会会報 (ISSN:00306622)

巻号頁・発行日

vol.68, no.1, pp.126-136, 1965 (Released:2007-06-29)

参考文献数

50

被引用文献数

5 1

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Histoanato amical structure of the vocal muscles of human adults was investigated and the sensory nerve endings in the vocal muscle were demonstrated by using various staining techniques.According to Goerttler (1950), medial part of the vocal cord consists of two parts, namely, pars thyreovocalis and pars aryvocalis. However, we could not find the muscle fibres which ran from the thyroid cartilage to the vocal ligament. Pars aryvocalis could be divided into the anterior and the posterior parts. The former beginning from the Proc. vocalis of the arytenoid cartilage attached to anterior half of the vocal ligament. The latter ran between middle part of the arytenoid cartilage, and posterior half of the vocal ligament. These two parts crossed each other like a network.Three types of the centripetal nerve endings in the vocal muscle were identified with the modified Bielschowsky's silber impregnation.The nerve belonging to the first type ended in a simple small knob. The nerve of the second type had spiral structure which wound about the muscle fibre like a tendril, and it seemed to be resembled to a muscle spindle, but it was not a muscle spindle. It was not enclosed with a capsule and did not contain intrafusal muscle fibres. The typical muscle spindles were not found in the human vocal muscle. The nerve belonging to the third type consisted of several nerve fibres which ran pararell each other like an ivy.The great majority of these endings were distributed in the middle one-third of the vocal cords. No communicative fibres between these endings and the endformation of the autonomic nervous system were recognized. The nature and significance of these stuctures were discussed.