Skip to Content

oculomotor nerve [CN III]

 

Definition: the third cranial nerve, it supplies all the extrinsic muscles of the eye, except the lateral rectus and superior oblique; it also supplies the levator palpebrae superioris and conveys presynaptic parasympathetic fibers to the ciliary ganglion for innervation of the ciliary muscle and sphincter pupillae; its origin is in the midbrain below the cerebral aqueduct; it emerges from the oculomotor sulcus of the mesencephalon in the interpeduncular fossa, pierces the dura mater to the side of the posterior clinoid process, passes in the lateral wall of the cavernous sinus, and enters the orbit through the superior orbital fissure.

Synonym(s): nervus oculomotorius [CN III]TA, motor oculi, oculomotorius, third cranial nerve [CN III]

Disclaimer: This site is designed to offer information for general educational purposes only. The health information furnished on this site and the interactive responses are not intended to be professional advice and are not intended to replace personal consultation with a qualified physician, pharmacist, or other healthcare professional. You must always seek the advice of a professional for questions related to a disease, disease symptoms, and appropriate therapeutic treatments.
© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
Hide