岩小神经由鼓室神经丛发出后，穿过耳蜗窗与前庭窗之间，越过鼓膜张肌窝，走向耳神经节。

The lesser petrosal nerve comes from the tympanic plexus running between cochlear window and vestibular window, over recess of tensor sympani muscle and toward otogaglion .

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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.

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