Ciliary ganglion
Nerves of the orbit, and the ciliary ganglion. Side view.
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Latin	'
Gray's	subject #200
System
MeSH	[1]

The ciliary ganglion is small parasympathetic ganglion lying in the orbit between the optic nerve and the lateral rectus muscle that is associated with the nasociliary nerve (a branch of the ophthalmic division of the trigeminal nerve). The ciliary ganglion is a part of the nervous pathway responsible for the constriction and dilation of the pupil as well as sensation from the cornea. Latin is an ancient Indo-European language originally spoken in the region around Rome called Latium. ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... Anatomy and Physiology of the A.N.S. In contrast to the voluntary nervous system, the involuntary or autonomic nervous system is responsible for homeostasis, maintaining a relatively constant internal environment by controlling such involuntary functions as digestion, respiration, and metabolism, and by modulating blood pressure. ... This is a dorsal root ganglion (DRG) from a chicken embryo (around stage of day 7) after incubation overnight in NGF growth medium stained with anti-neurofilament antibody. ... In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. ... The optic nerve is the nerve that transmits visual information from the retina to the brain. ... The lateral rectus muscle is a muscle in the orbit that abducts the eyeball (makes it move outwards). ... The Ophthalmic nerve is one of the three branches of the trigeminal nerve, one of the cranial nerves. ... The trigeminal nerve is the fifth (V) cranial nerve, and carries sensory information from most of the face, as well as motor supply to the muscles of mastication (the muscles enabling chewing), tensor tympani (in the middle ear) and other muscles in the floor of the mouth, such as the... The human eye The pupil is the central transparent area (showing as black). ...

It receives presynaptic fibers from the Edinger-Westphal nucleus by way of the oculomotor nerve (CN III), and, in turn, gives rise to postsynaptic fibers that innervate the ciliary muscle and the iris sphincter muscle. In a synapse between two neurons, the cell that releases the neurotransmitter is referred to as the presynaptic cell. ... The Edinger-Westphal nucleus is the accessory parasympathetic nucleus of the oculomotor nerve, supplying the constricting muscles of the iris. ... The oculomotor nerve () is the third of twelve paired cranial nerves. ... A synapse is a connection between two neurons: presynaptic and postsynaptic. ... The ciliary muscle is a muscle that affects zonules in the eye (fibers that suspend the lens in position during accommodation), enabling changes in lens shape for light focusing. ... The Iris sphincter muscle is a muscle of the human body. ...

Roots

It receives three roots:

• (1) sensory fibers that come directly from the nasociliary nerve, and do not synapse in the ganglion;
• (2) sympathetic fibers that come from the the plexus associated with the internal carotid artery and the ophthalmic artery, and do not synapse in the ganglion;
• (3) presynaptic parasympathetic fibers from the inferior division of the oculomotor nerve (CNIII, Edinger-Westphal nucleus). The parasympathetic fibers synapse within the ganglion.

(See also sense) A sensory system is a part of the nervous system that consists of sensory receptors, neural pathways, and those parts of the brain responsible for processing the information. ... The Ophthalmic nerve is one of the three branches of the trigeminal nerve, one of the cranial nerves. ... Illustration of the major elements in a prototypical synapse. ... The sympathetic nervous system (SNS) is one half of the autonomic nervous system; the parasympathetic nervous system (PNS) is the other. ... The carotid artery is a major artery of the head and neck that supplies blood to the head and neck. ... The opthalmic artery is a branch of the internal carotid artery which supplies branches to supply the eye and other structures in the orbit: Central retinal artery Supraorbital artery Supratrochlear artery Lacrimal artery Dorsal nasal artery Short posterior ciliary arteries Long posterior ciliary arteries Posterior ethmoidal artery Anterior ethmoidal artery... In a synapse between two neurons, the cell that releases the neurotransmitter is referred to as the presynaptic cell. ... It has been suggested that Parasympatholytic be merged into this article or section. ... The oculomotor nerve () is the third of twelve paired cranial nerves. ... The Edinger-Westphal nucleus is the accessory parasympathetic nucleus of the oculomotor nerve, supplying the constricting muscles of the iris. ...

Paths

Gray's Fig. 775 - Plan of oculomotor nerve.

The postganglionic fibers travel via the short ciliary nerve. These include: Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy, is an anatomy textbook widely regarded as a classic work on human anatomy. ... The oculomotor nerve () is the third of twelve paired cranial nerves. ...

• (1) general sensory to the eye;
• (2) sympathetic fibers to the dilator pupillae;
• (3) parasympathetic fibers to the sphincter pupillae and ciliary muscles of the eye.

To meet Wikipedias quality standards, this article or section may require cleanup. ... The Iris dilator muscle is a muscle of the human body. ... The ciliary muscle is a muscle that affects zonules in the eye (fibers that suspend the lens in position during accommodation), enabling changes in lens shape for light focusing. ...

External links

• SUNY Figs 29:03-04