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Temporal bone

The temporal bones are situated at the sides and base of the skull, and lateral to the temporal lobes of the cerebrum.

The temporal bone supports that part of the face known as the temple and houses the structures of the organ of hearing. The lower seven cranial nerves and the major vessels to and from the brain traverse the temporal bone.

Divisions

The temporal bone is externally divided into squamosal, petrous, mastoid, tympanic, and styloid parts.

see Petrous bone

The squamous part encloses mainly the temporal lobe and is connected to the sphenoid bone and parietal bones anteriorly and posterosuperiorly respectively. The mastoid part is usually well pneumatized and separated from the suboccipital bone posteriorly through the occipitomastoid suture.

Superiorly from the parietal bone and squamous part through the parietomastoid suture and supramastoid crest respectively; and anteriorly it is connected with the external auditory canal through the spine of Henle.

The squamous, mastoid and petrous parts are all of them related with these posterior transpetrosal approaches in different degrees.

Imaging

The development of new imaging techniques coupled with new treatment algorithms has created new possibilities in treating temporal bone diseases.

Magnetic resonance (MR) diffusion-weighted imaging in cholesteatomas and skull base epidermoids, whole-body molecular imaging in paragangliomas of the jugular foramen, and MR arterial spin labeling perfusion for dural arteriovenous fistulas and arteriovenous malformations 1).

1)
Corrales CE, Fischbein N, Jackler RK. Imaging Innovations in Temporal Bone Disorders. Otolaryngol Clin North Am. 2015 Apr;48(2):263-280. doi: 10.1016/j.otc.2014.12.002. Review. PubMed PMID: 25769351.
temporal_bone.txt · Last modified: 2015/07/08 01:03 (external edit)