Long ciliary nerves

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Long ciliary nerves are important structures in the human body that play a crucial role in the nervous system. They are part of the ophthalmic division of the trigeminal nerve (cranial nerve V) and are responsible for providing sensory innervation to the eye.

Anatomy

The long ciliary nerves originate from the nasociliary nerve, which is a branch of the ophthalmic nerve. They travel along the optic nerve and enter the eyeball by piercing the sclera near the optic disc. These nerves then run between the sclera and the choroid to reach the ciliary body and the iris.

Function

The primary function of the long ciliary nerves is to provide sensory innervation to the cornea, iris, and ciliary body. They are responsible for transmitting sensory information, such as pain and temperature, from the eye to the brain. This sensory input is crucial for the protective reflexes of the eye, such as the corneal reflex.

Clinical Significance

Damage to the long ciliary nerves can result in a loss of sensation in the cornea and other parts of the eye, which can lead to conditions such as neurotrophic keratitis. This condition can cause corneal ulcers and infections due to the lack of protective reflexes.

Related Structures

• Short ciliary nerves
• Ciliary ganglion
• Ophthalmic artery
• Optic nerve

See Also

• Trigeminal nerve
• Ophthalmic nerve
• Nasociliary nerve
• Corneal reflex