The middle ita10/31/2023 ![]() Just below the optic nerve, the internal carotid loops back and turns upward to become the middle cerebral artery of the circle of Willis. Passing over the foramen lacerum, the internal carotid emerges from its canal and follows the carotid groove upward along the medial wall of the middle cranial fossa, passing through the cavernous sinus. ![]() ![]() The internal carotid then turns forward and runs in the carotid canal inside the petrous part of the temporal bone. After branching from the common carotid, the internal carotid continues in the carotid sheath to the carotid foramen in the base of the skull just anterior to the jugular foramen. ![]() One of the two divisions of the common carotid artery.
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