MedicineNeurologyOphthalmologyCranial Nerve DisordersNeuro-ophthalmologyOcular DiseaseCranial Nerve PalsiesCranial NervesNerve Compression SyndromesNeuro-ophthalmic DisordersNeuro-ophthalmic PathologyOculomotor Nerve DisordersNeurogenic PtosisOcular Motor Cranial Nerve PalsiesOcular Motor Nerve PalsiesOculomotor Nerve AnatomyOculomotor Nerve Aneurysm CompressionPosterior Cerebral Artery AnatomyPosterior Communicating Artery Anatomy
Oculomotor palsy secondary to a berry aneurysm is usually present with pupillary dilatation, followed by other signs of third cranial nerve dysfunction, including oculomotor paresis and ptosis. Partial paralysis of the nerve with pupil sparing has been observed, but ptosis as the sole sign of oculomotor paralysis has not previously been reported until now.