Internal Carotid Artery in Petrous Part of Temporal Bone Anatomy Posterior communicating artery, Anterior cerebral arteries (A2 segments), Right optic nerve (CN II), Medial frontobasal (medial orbitofrontal) artery, Long medial striate artery (recurrent artery of Heubner), Anterior communicating artery, Anterior cerebral artery (A1 segment), Superior hypophyseal arteries, Left optic nerve (CN II), Sphenoidal sinus, Ophthalmic artery, Dorsal meningeal artery, Meningeal branch, Cavernous part…