Carotid ring
The internal carotid artery exits the cavernous sinus and enters the subarachnoid space at the dural constriction known as the carotid ring or clinoidal ring.
carotid_ring
The internal carotid artery exits the cavernous sinus and enters the subarachnoid space at the dural constriction known as the carotid ring or clinoidal ring.