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Palmer Spinal Exam 4 Practice

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Which area of the temporal bone houses the inner ear structures?
Correct Answer:
Petrous portion
Explanation:
The petrous portion of the temporal bone houses the inner ear structures. This dense, pyramid-shaped part forms the bony labyrinth that encloses the cochlea and the semicircular canals, which are responsible for hearing and balance. It also contains the internal acoustic meatus, where the vestibulocochlear nerve (CN VIII) travels. The other portions have different roles: the mastoid portion contains air cells connected to the middle ear; the tympanic portion forms part of the ear canal and middle ear walls; the squamous portion provides the lateral skull surface and zygomatic-temporal relationships. So the inner ear sits specifically within the petrous portion.

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