What does the Edinger Westphal nucleus do?
What does the Edinger Westphal nucleus do?
The Edinger–Westphal nuclei provide preganglionic input to the ciliary ganglion mediating the pupillary light reflex and accommodation responses of the lens (i.e., the ciliary body).
Where is the Edinger Westphal nucleus found?
midbrain
The EWpg is what is thought of as the classic ONC—sending parasympathetic nerve fibers towards the eye. It is located in the midbrain immediately dorsal to the oculomotor nucleus near the level of the superior colliculus, which is why it is often included in the overarching term oculomotor complex.
What does ciliary ganglion contain?
The ciliary ganglion contains postganglionic parasympathetic neurons that supply the ciliary muscle and the pupillary sphincter muscle. Because of the much larger size of the ciliary muscle, 95% of the in neurons in the ciliary ganglion innervate it compared to the pupillary sphincter.
What is the geniculate ganglion?
The geniculate ganglion is a sensory ganglion of the facial nerve (CN VII). It contains the cell bodies of the fibers responsible for conducting taste sensation from the anterior two-thirds of the tongue.
Where is the submandibular ganglion located?
The submandibular ganglion is located inferiorly to the lingual nerve, from which it is suspended. Pre-ganglionic fibres: The ganglion is supplied by fibres from the superior salivatory nucleus (associated with the facial nerve). These fibres are carried within a branch of the facial nerve, the chorda tympani.
How many nerves leave the ganglion?
Two to five pairs of lateral nerves leave each ganglion to innervate the body wall of that segment. A subepidermal nerve plexus occurs over the whole body. Another plexus, called the enteric, stomodaeal, or sympathetic system, is found in…
Is the geniculate ganglion in the middle ear?
The geniculate ganglion is located close to the internal auditory meatus. It is covered superiorly by the petrous part of the temporal bone (which is sometimes absent over the ganglion). The geniculate ganglion receives fibers from the motor, sensory, and parasympathetic components of the facial nerve.
What is the function of the Edinger Westphal nuclei?
The Edinger–Westphal nuclei provide preganglionic input to the ciliary ganglion mediating the pupillary light reflex and accommodation responses of the lens (i.e., the ciliary body).
What is the ciliary ganglion?
The ciliary ganglion is one of four parasympathetic ganglia of the head and neck. It receives parasympathetic fibres from the oculomotor nerve. smallest of the ganglia (2mm in size) located posterolaterally in the intraconal space of the orbit (towards the orbital apex) between the optic nerve and the lateral rectus muscle.
What nerve innervates the ciliary ganglion?
Parasympathetic preganglionic nerve fibers from the Edinger-Westphal nucleus innervate the ciliary ganglion, which supplies the ciliary muscle (aiding in accommodation to near vision) and the pupillary constrictor muscle (constricting the pupil).
What is the history of the Edinger nucleus?
The nucleus is named for both Ludwig Edinger, from Frankfurt, who demonstrated it in the fetus in 1885, and for Karl Friedrich Otto Westphal, from Berlin, who demonstrated it in the adult in 1887. The cranial nerve nuclei schematically represented; dorsal view. Motor nuclei in red; sensory in blue.
