Petrous portion
Encyclopedia
Petrous portion can refer to:
- Petrous portion of the temporal bonePetrous portion of the temporal boneThe petrous portion of the temporal bone or pyramid is pyramidal and is wedged in at the base of the skull between the sphenoid and occipital bones. Directed medially, forward, and a little upward, it presents for examination a base, an apex, three surfaces, and three angles, and contains, in its...
- Petrous portion of the internal carotid arteryPetrous portion of the internal carotid arteryPetrous portion of the internal carotid artery .—When the internal carotid artery enters the canal in the petrous portion of the temporal bone, it first ascends a short distance, then curves forward and medially, and again ascends as it leaves the canal to enter the cavity of the skull between the...