Petrous Part, Posterior Surface Anatomy in 3D

The "Back Wall" of the ear bone. It has a hole called the "Internal Auditory Canal" for the hearing and balance nerves; a tumor here (Acoustic Neuroma) causes hearing loss and dizziness.

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Related structures

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