"rapidly enlarging with or without SAH is the most common cause, and usually involves only the oculomotor nerve"
"non-aneurysmal neurovascular compression 3 could be caused by vascular variants such as fetal PCA, persistent trigeminal artery, and an elongated or duplicated superior cerebellar artery 5"
"Radiologic Features"
Expected headings
"Radiologic Features"
"Oculomotor nerve palsies, or third nerve palsies, result in weakness of the muscles supplied by the oculomotor nerve, namely the superior rectus, inferior rectus, medial rectus, inferior oblique, and levator palpebrae superioris muscles."
"If the pupil is normal-sized and reactive to light, it is called a pupil-sparing third nerve palsy; conversely if the pupil is enlarged and non-reactive, it is called a non-pupil sparing third nerve palsy."
"dorsal midbrain (nuclear lesions): usually due to small regions of infarction; often no other neurological symptoms"
"when the process is more diffuse, such as in cavernous sinus syndrome, other cranial nerves are also involved (e.g. Tolosa-Hunt syndrome)"