Within the cavernous sinus, which cranial nerve travels centrally with the internal carotid artery?

Within the cavernous sinus, which cranial nerve travels centrally with the internal carotid artery?

• A. CN III
• B. CN IV
• C. CN VI
• D. CN V2

Answer: (C)

The key idea is how nerves are positioned inside the cavernous sinus relative to the internal carotid artery. The abducens nerve runs right alongside the artery within the sinus, effectively traveling centrally with it as it courses toward the superior orbital fissure. This central path near the ICA sets it apart from the other nerves in the cavernous sinus, which travel in the lateral wall (oculomotor and trochlear nerves, and the ophthalmic and maxillary branches of the trigeminal nerve). So the nerve that travels with the internal carotid artery inside the cavernous sinus is the abducens nerve.

The key idea is how nerves are positioned inside the cavernous sinus relative to the internal carotid artery. The abducens nerve runs right alongside the artery within the sinus, effectively traveling centrally with it as it courses toward the superior orbital fissure. This central path near the ICA sets it apart from the other nerves in the cavernous sinus, which travel in the lateral wall (oculomotor and trochlear nerves, and the ophthalmic and maxillary branches of the trigeminal nerve). So the nerve that travels with the internal carotid artery inside the cavernous sinus is the abducens nerve.