[Applied anatomy of abut structures of internal auditory meatus (IAM) through middle cranial fossa approach]
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Updated: Sep 27, 2026

Discovering Middle Ear Anatomy by Transcanal Endoscopic Ear Surgery: A Dissection Manual
Published on: January 11, 2018
Hexin Chen1, Weidong Li, Shizhen Zhong
1Department of Otorhinolaryngology, Nanfang Hospital, the First Military Medical University, Guangzhou 510515.
Objective:
To provide anatomical basis for operation of internal auditory meatus(IAM). Correlation structures with IAM were measured according to sign of hiatus of facial nerve.
Method:
These structures include spinous foramen, superficial geater petrosal nerve, superficial lesser petrosal nerve, hiatus of facial nerve were measured on 24 wet cranial bone (48 sides).
Result:
It is demonstrated that 8.3% geniculate ganglion and labyrinth segment of facial nerve Variation which distance from hiatus of facial nerve to geniculate ganglion is distinct.
Conclusion:
Our data will be very holpful for location of IAM during operation via middle cranial fossa approach.
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