Oculomotor

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Information about Oculomotor
Education

Published on February 22, 2014

Author: ennbeee

Source: slideshare.net

Description

Oculomotor Nerve
pathway and functions

Oculomotor Nerve The third Nerve Nuclei: Nerve originates from two nuclei 1.Motor neurons in the oculomotor (somatomotor) 2.Edinger-Westphal (visceral motor) nuclei in the brainstem Axons emerge out of nucleus , exit the ventral surface of the brainstem as the oculomotor nerve passes through the dura mater, lateral wall of the cavernous sinus and then enters the superior orbital fissure to access the orbit. Somatomotor component of the nerve divides into a superior and inferior division

The superior division supplies levator palpebra superioris and superior rectus muscles • • • The inferior division supplies medial rectus, inferior rectus and inferior oblique muscles. The visceromotor or parasympathetic component of the oculomotor nerve travels with inferior division. In the orbit the inferior division sends branches that enter the ciliary ganglion where they form functional contacts (synapses) with the ganglion cells

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