镫骨后弓相当于鼓阶的前界。
The posterior arch of stapes was situated in the prozone of scala.
前庭窗与圆窗的位置关系相对稳定，因此镫骨头（砧镫关节）可作为参照标志来确定鼓阶钻孔的位置。
The location of vestibular window and the round window is relatively stable, so the stapes head can be used as a reference for drilling scala tympani.
侧脑室穿刺后，脑脊液中红细胞可经耳蜗导管到达外淋巴，并随外淋巴纵行流动广泛分布到各转鼓阶和前庭阶。
Red blood cells in CSF can reach perilymphatic space through the cochlear canal, and widely distribute in scalae tympani and scala vestibuli after lateral ventricle puncture.
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