part of part of innervates innervates branching part of branching part of Homo sapiens nerve ciliary muscle iris main ciliary ganglion iris nerve parasympathetic nerve nerve of head region tunica fibrosa of eyeball short ciliary nerve Wikipedia:Short_ciliary_nerves nervi ciliares brevis nervi ciliares breves SCTID:417598000 UBERON:0022302 A branch of the ciliary ganglion that innervates the ciliary muscles, the iris, and the tunics of the eyeball. FMA:7041 Contains preganglionic parasympathetic axons. lower branch of ciliary ganglion short ciliary nerve