Tags: Anatomical Structure, Nerve.
The oculomotor nerve is the third cranial nerve. It enters the orbit via the superior orbital fissure and controls most of the eye’s movements including constriction of the pupil and maintaining an open eyelid by innervating the levator palpebrae superioris muscle. The oculomotor nerve is derived from the basal plate of the embryonic midbrain. Cranial nerves IV and VI also participate in control of eye movement.
