著者

伊藤 信輔 小田原 修一 山口 勝矢 平野 実

出版者

耳鼻咽喉科臨床学会

雑誌

耳鼻咽喉科臨床 (ISSN:00326313)

巻号頁・発行日

vol.82, no.12, pp.1719-1725, 1989-12-01 (Released:2011-11-04)

参考文献数

15

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The relationship between the direction of rotation and the leg supporting the body in figure-skating was thought to be based on the cristo-spinal reflex. Skaters stand or jump with the leg of the same side as the rotation when turning around a vertical axis. This suggests that the movement of endolymphatic fluid towards the ampulla of the ipsilateral horizontal semicircular canal as the direction of rotation exerts a facilitatory action on the extensor neurons. On the other hand, they land on the ice with the opposite leg after turning in the air. This can be interpreted as a phenomenon similar to postrotatory nystagmus; that is, the ampullopetal flow takes place in the semicircular canal opposite to the rotation after cessation of turning, resulting in activation of this canal.