and the trochlear nerve (CN IV), it provides movement to the muscles around the eyeball rather than attaching to the eye itself. Humans have 12 cranial nerves that exist in generally symmetrical ...

The ophthalmic nerve is the first branch of the trigeminal nerve, which is also known as the fifth cranial nerve ... three motor nerves of the eye including the trochlear nerve, the oculomotor ...

Isolated CN palsies are rare signs of MS. [143] Lesions within the brainstem may cause injury to the CN III, CN IV or CN VI nuclei or fascicles resulting in oculomotor, trochlear or abducens nerve ...