petrous part of temporal bone
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a division of a larger structure.
mastoid part of temporal bone the posterior portion of the petrous (or petromastoid) part. Called also mastoid bone.
petromastoid part of temporal bone see petrous part of temporal bone.
petrous part of temporal bone the part of the temporal bone located at the base of the cranium, containing the inner ear. Some anatomists divide it into two separate subparts, calling the posterior section the mastoid part, reserving the term petrous part for the anterior section only, and calling the entire area the petromastoid part. Called also petrous bone.
squamous part of temporal bone the flat, scalelike, anterior superior portion of the temporal bone. Called also squamous bone.
tympanic part of temporal bone the part of the temporal bone forming the anterior and inferior walls and part of the posterior wall of the external acoustic meatus. Called also tympanic bone.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
pet·rous part of tem·po·ral bone[TA]
the part of the temporal bone that contains the structures of the inner ear and the second part of the internal carotid artery; in prenatal life it appears as a separate ossification center.
Synonym(s): pars petrosa ossis temporalis [TA], periotic bone, petrosal bone, petrous bone, petrous pyramid
Farlex Partner Medical Dictionary © Farlex 2012
pet·rous part of tem·po·ral bone(pet'rŭs pahrt tem'pŏr-ăl bōn) [TA]
The part of the temporal bone that contains the structures of the internal ear and the second part of the internal carotid artery; in prenatal life, it appears as a separate ossification center.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012