Where does the basilar artery rest within the skull?

• A. Occipital bone
• B. Clivus
• C. Petrous part of the temporal bone
• D. Sphenoid bone

Answer: (B)

The basilar artery is situated on the clivus, which is a bony structure located at the base of the skull. The clivus forms a slope that extends from the posterior aspect of the sphenoid bone to the anterior aspect of the foramen magnum. This positioning is crucial as it provides a supportive foundation for the arteries and structures in proximity to the brainstem.

The basilar artery itself runs along the midline and supplies blood to key areas of the brain, including parts of the cerebellum, brainstem, and occipital lobes. Understanding its location is important for comprehending various vascular conditions and surgical approaches within the cranial cavity.

The other bones listed do not align with the anatomical location of the basilar artery. While the occipital bone, petrous part of the temporal bone, and sphenoid bone are all parts of the skull and have significant anatomical relevance, they do not directly house the basilar artery in the same way the clivus does.