Conclusion: The hiatus of canal for greater petrosalnerve and arcuate eminence are important landmarks to defined internal auditory canal.
结论：岩大神经管裂孔、弓状隆起等颞骨岩部结构是定位内耳道的重要标志。
2
The lesser petrosalnerve comes from the tympanic plexus running between cochlear window and vestibular window, over recess of tensor sympani muscle and toward otogaglion .
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。
3
Objective: to study the relationship between trigeminal nerve, cerebellar arteries and petrosal veins, and provide anatomic bases for clinical diagnosis and treatment of trigeminal neuralgia.