Oculomotor n. (CN III) [motor, preganglionic parasympathetic]

Question 1

Superior ramus

a. Muscular branches

Answer 1

function- motor innervation (oculomotor nucleus of the midbrain) of the superior rectus and levator palpebrae superioris muscles

Question 2

Inferior ramus

a. Muscular branches

Answer 2

function- motor innervation (oculomotor nucleus of the midbrain) of the medial rectus, inferior rectus and inferior oblique muscles

Question 3

Inferior ramus

b. Parasympathetic communication to the ciliary ganglion

Answer 3

function- preganglionic parasympathetic innervation (Edinger-Westphal nucleus of the midbrain) of the ciliary ganglion, the postganglionic parasympathetic axons travel with the short ciliary nerves (branches of the ophthalmic division of the trigeminal nerve) and innervate the ciliary body and constrictor muscle of the iris