Conclusion: The hiatus of canal for greater petrosal nerve 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
Pyramidal eminence and chordal eminence should not be lowly abraded in order to avoid damaging the musculus stapedius and chorda tympani nerve when dealing with a facial recess lesion.