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。
Conclusion: The hiatus of canal for greater petrosal nerve and arcuate eminence are important landmarks to defined internal auditory canal.
结果IPS行于颅底内面的岩下窦沟内，即由斜坡和颞骨岩部组成的岩斜裂内，形状不规则。
Result IPS courses in the sulcus for inferior petrosal sinus, that was, on the intracranial surface of the petroclival fissure which was made up of the clivus and the petrous pyramid.
目的：研究颅中窝硬脑膜外经颞骨岩部入路进行岩斜区直接手术的手术方法，并提供相应的解剖依据。
Objective: To study the operative technique for extended middle fossa extradural transpetrosal approach to petroclival region and to provide correspondingly anatomical basis.
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