Anatomy and Origin - The long ciliary nerves branch from the nasociliary nerve as it crosses the optic nerve (CN II). - The long ciliary nerves originate from the nasociliary nerve. - The nasociliary nerve crosses the optic nerve (CN II). - The long ciliary nerves pierce and enter the posterior part of the sclera near where it is entered by the optic nerve. - The entry point of the long ciliary nerves is near where the optic nerve enters the sclera. - The long ciliary nerves run between the sclera and the choroid. - The long ciliary nerves accompany the short ciliary nerves.

Function - The long ciliary nerves provide sensory innervation to the eyeball, including the cornea. - The long ciliary nerves contain post-ganglionic sympathetic fibers from the superior cervical ganglion for the dilator pupillae muscle. - Sympathetic fibers to the dilator pupillae muscle mainly travel in the nasociliary nerve. - There are also sympathetic fibers in the short ciliary nerves that pass through the ciliary ganglion without forming synapses. - The long ciliary nerves play a role in controlling the dilation of the pupil.

Course - The long ciliary nerves run anterior-ward between the sclera and the choroid. - The course of the long ciliary nerves is anterior-ward.

Related - Short ciliary nerves are related to the long ciliary nerves. - The ciliary ganglion is involved in the pathway of the long ciliary nerves. - The long ciliary nerves are part of the ophthalmic nerve. - Grays Anatomy: The Anatomical Basis of Clinical Practice is a reference book that includes information about the long ciliary nerves. - The long ciliary nerves are classified as a neuroanatomy stub.

Summary - The long ciliary nerves branch from the nasociliary nerve and provide sensory innervation to the eyeball, including the cornea. - They also contain sympathetic fibers for the dilator pupillae muscle and play a role in controlling pupil dilation. - The long ciliary nerves run between the sclera and the choroid, and their course is anterior-ward. - They are related to the short ciliary nerves and are part of the ophthalmic nerve. - Additional information about the long ciliary nerves can be found in Grays Anatomy: The Anatomical Basis of Clinical Practice.