Corpus: Long root of the ciliary ganglion
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Synonyms: Ramus communicans cum ganglio ciliare, Radix sensoria ganglii ciliaris
1. Definition
The radix longa ganglii ciliaris is a branch of the nasociliary nerve.
2. Course
The radix longa usually departs from the nasociliary nerve between the two heads of the rectus lateralis muscle. It runs rostrally along the lateral side of the optic nerve and enters the ciliary ganglion at its posterosuperior end.
The nerve contains somatosensory fibres from the eyeball, which pass through the ciliary ganglion without being connected. Its nerve cell bodies are located in the trigeminal ganglion.
3. Function
The radix longa ganglii ciliaris supplies the cornea and parts of the conjunctiva with sensation.