鸽子体内类似韧皮部的瓣膜？
A Bast-like valve in the pigeon?
作者信息
Hofman Rutger, Segenhout J M, Wit H P
机构信息
Department of Otorhinolaryngology, University Medical Center Groningen, P.O. Box 30001, 9700 RB, Groningen, The Netherlands.
出版信息
Eur Arch Otorhinolaryngol. 2009 Sep;266(9):1397-401. doi: 10.1007/s00405-009-0934-7. Epub 2009 Mar 6.
The first description of the presence of a utriculo-endolymphatic valve in human fetuses was given by Bast in 1928. Since then this valve-like structure is called Bast's valve. Its exact function has not yet been established. The general opinion is that it has a protective function by having the possibility to separate the superior endolymphatic compartments of the labyrinth from the inferior compartment. Phylogenetically seen birds are the first vertebrates with a cochlear duct and a distinct inferior and superior part of the labyrinth. A structure in the pigeon inner ear, resembling Bast's valve in mammals, is described.
1928年，巴斯首次描述了人类胎儿中存在椭圆囊内淋巴管瓣膜。从那时起，这种瓣膜样结构就被称为巴斯氏瓣。其确切功能尚未确定。普遍观点认为，它具有保护功能，因为它有可能将迷路的上半规管内淋巴腔与下半规管内淋巴腔分隔开。从系统发育角度看，鸟类是最早具有耳蜗管以及迷路明显的上下部分的脊椎动物。本文描述了鸽子内耳中一种类似于哺乳动物巴斯氏瓣的结构。
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