Petrous Part, Apex Anatomy in 3D

The medial-most tip of the temporal bone that houses the internal carotid artery and the trigeminal ganglion. Gradenigo’s syndrome (apical petrositis) involves this area, causing ear discharge, abducens nerve palsy, and facial pain.

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Related structures

Temporal Bone Petrous part of temporal bone Petrous Part, Anterior Surface Petrous Part, Posterior Surface Mastoid Notch Mastoid Process Squamous part of temporal bone Sternocleidomastoid Muscle (Temporal Bone Insertion)