Other Cranial Nerves. The presentation of headache and ptosis will most likely unveil a painful cranial nerve III palsy that is usually of microvascular or aneurysmal etiology.

Isolated Third, Fourth, and Sixth Cranial Nerve Palsies From Presumed Microvascular Versus Other Causes: A Prospective Study . Tamhankar MA, Biousse V, Ying GS, et al Ophthalmology. 2013;120:2264-2269 ...