前庭阶
Scala vestibuli
定义
骨性螺旋板延伸至管腔外壁约一半处，将管腔部分分隔为两条通道，即两个阶：上方的称为前庭阶，下方的称为鼓阶。
參考資料
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
