Long ciliary nerves

Short description: Branch of the nasociliary nerve

Long ciliary nerves

Nerves of the orbit, and the ciliary ganglion. Side view.

Details
From| Nasociliary nerve
Innervates| Cornea, iris, and ciliary body
Fiber type| "Somatosensory" (via V1 Lacrimal), and "Sympathetic" (via V2 Zygomatic)
Identifiers
Latin| nervi ciliares longi
Anatomical terms of neuroanatomy

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The long ciliary nerves are two-three sensory nerves that arise from the nasociliary nerve (itself a branch of the ophthalmic branch (CN V1) of the trigeminal nerve (CN V)).[1] They pass forward within the orbit, passing toward the eyeball alongside the optic nerve (CN II).[2] They enter the eyeball to provide sensory innervation to the cornea, iris, and ciliary body.[3] They also provide sympathetic visceral motor innervation to the dilator pupillae muscle, which is responsible for dilation of the pupil.[4] The long ciliary nerves are clinically relevant in conditions affecting corneal sensitivity, pupillary responses, and surgical procedures involving the eye.[5]

## Contents

* 1 Anatomy
* 1.1 Origin
* 1.2 Course
* 2 Function
* 2.1 Sensory
* 2.2 Sympathetic
* 3 See also
* 4 Additional images
* 5 References
* 6 External links

## Anatomy

### Origin

The long ciliary nerves branch from the nasociliary nerve as it crosses the optic nerve (CN II).[1]

### Course

Accompanied by the short ciliary nerves, the long ciliary nerves pierce and enter[1] the posterior part of the sclera near where it is entered by the optic nerve, then run anterior-ward between the sclera and the choroid.[1]

## Function

The long ciliary nerves are distributed to the ciliary body, iris, and cornea.[1]

### Sensory

The long ciliary nerves provide sensory innervation to the eyeball, including the cornea.[6]

### Sympathetic

## See also

* Short ciliary nerves

## Additional images

* Pathways in the ciliary ganglion.

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42nd ed.). New York. pp. 783. ISBN 978-0-7020-7707-4. OCLC 1201341621.
2. ↑ Ansari, Mohammad Wakeel; Nadeem, Ahmed (2016). "Atlas of Ocular Anatomy". Ocular Anatomy. doi:10.1007/978-3-319-42781-2. https://link.springer.com/book/10.1007/978-3-319-42781-2?error=cookies_not_supported&code=988742a0-3716-4576-89ca-a88746e5dca8.
3. ↑ Levin, Leonard A.; Kaufman, Paul L.; Hartnett, Mary Elizabeth (2024). Adler's physiology of the eye (12th ed.). Chantilly: Elsevier. ISBN 978-0-323-83407-0.
4. ↑ Wu, Feipeng; Zhao, Yin; Zhang, Hong (2022-01-14). "Ocular Autonomic Nervous System: An Update from Anatomy to Physiological Functions" (in en). Vision 6 (1): 6. doi:10.3390/vision6010006. ISSN 2411-5150. PMID 35076641. PMC 8788436. https://www.mdpi.com/2411-5150/6/1/6.
5. ↑ Lum, Edward; Corbett, Melanie C.; Murphy, Paul J. (July 2019). "Corneal Sensitivity After Ocular Surgery" (in en). Eye & Contact Lens: Science & Clinical Practice 45 (4): 226–237. doi:10.1097/ICL.0000000000000543. ISSN 1542-2321. https://journals.lww.com/00140068-201907000-00003.
6. ↑ Yang, Alina Y.; Chow, Jessica; Liu, Ji (March 2018). "Corneal Innervation and Sensation: The Eye and Beyond". The Yale Journal of Biology and Medicine 91 (1): 13–21. ISSN 1551-4056. PMID 29599653. PMC 5872636. https://pubmed.ncbi.nlm.nih.gov/29599653.

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

## External links

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