Oculomotor (cn iii)- given the patients symptoms, it seems that some nerve involving vision and the ability to control the eye has been injured. now, you need to think about which nerve might be damaged by an aneurysm of the superior cerebellar artery. the oculomotor nerve, which innervates the superior rectus, medial rectus, inferior rectus, and inferior oblique muscles, passes between the posterior cerebral artery and the superior cerebellar artery. it could be injured if there was enlargement of or damage to either of these vessels. none of the other cranial nerves are in the right position to be injured from an aneurysm of the superior cerebellar artery.
