IAM divides petrous apex into
1. anterior portions - contains marrow and air cells
2. posterior otic capsule
Aereated in 1/3rd by peritubal, posteromedial and subarcuate tracts which extend superior and inferior to cochlea to communicate with middle ear
Anterior compartment:
Contains horizontal portion of petrous carotid canal and foramen lacerum
Relations:
VI N medial and V N superomedial
Reference:
Connor SEJ et al. Imaging of the petrous apex: a pictorial review. British Journal of Radiology (2008) 81, 427-435
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Head and Neck Imaging Notes
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