Vestibular nuclei

Vestibular nuclei
Dissection of brainstem. Dorsal view. (Caption for "Vestibular nucleus" is visible at left.)
Details
Part of	Medulla
System	Vestibular system
Artery	AICA, PICA
Identifiers
Latin	nuclei vestibulares
MeSH	D014726
NeuroNames	714
NeuroLex ID	birnlex_1337
TA98	A14.1.04.242 A14.1.05.425
TA2	5933
FMA	72239
Anatomical terms of neuroanatomy [edit on Wikidata]

The vestibular nuclei (VN) are the cranial nuclei for the vestibular nerve located in the brainstem.

In Terminologia Anatomica, they are grouped in both the pons and the medulla in the brainstem.

Structure

Path

The fibers of the vestibular nerve enter the medulla oblongata on the medial side of those of the cochlear, and pass between the inferior peduncle and the spinal tract of the trigeminal nerve.

They then divide into ascending and descending fibers. The latter end by arborizing around the cells of the medial nucleus, which is situated in the area acustica of the rhomboid fossa. The ascending fibers either end in the same manner or in the lateral nucleus, which is situated lateral to the area acustica and farther from the ventricular floor.

Some of the axons of the cells of the lateral nucleus, and possibly also of the medial nucleus, are continued upward through the inferior peduncle to the roof nuclei of the opposite side of the cerebellum, to which also other fibers of the vestibular root are prolonged without interruption in the nuclei of the medulla oblongata.

A second set of fibers from the medial and lateral nuclei end partly in the tegmentum, while the remainder ascend in the medial longitudinal fasciculus to arborize around the cells of the nuclei of the oculomotor nerve.

Fibers from the lateral vestibular nucleus also pass via the vestibulospinal tract, to anterior horn cells at many levels in the spinal cord, in order to co-ordinate head and trunk movements.

Subnuclei

There are 4 subnuclei; they are situated at the floor of the fourth ventricle.

See also

• Vestibular nerve
• Vestibulocerebellar syndrome

References

This article incorporates text in the public domain from page 788 of the 20th edition of Gray's Anatomy (1918)

External links

• Illustration and text: Bs97/TEXT/P13/intro.htm at the University of Wisconsin-Madison Medical school
• https://web.archive.org/web/20080405062814/http://www.lib.mcg.edu/edu/eshuphysio/program/section8/8ch6/s8ch6_29.htm
• Parkinson.org
• Motor Systems Cerebellum