Medial geniculate body

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Brain: Medial geniculate body
Thalamic nuclei: MNG = Midline nuclear group AN = Anterior nuclear group MD = Medial dorsal nucleus VNG = Ventral nuclear group VA = Ventral anterior nucleus VL = Ventral lateral nucleus VPL = Ventral posterolateral nucleus VPM = Ventral posteromedial nucleus LNG = Lateral nuclear group PUL = Pulvinar MTh = Metathalamus LG = Lateral geniculate nucleus MG = Medial geniculate nucleus
Hind- and mid-brains; postero-lateral view. (Medial geniculate body visible near top.)
Latin	'
Gray's	subject #188 806
Part of
Components
Artery
Vein
BrainInfo/UW	hier-338
MeSH	[1]

The medial geniculate nucleus is a nucleus of the thalamus that acts as a relay for auditory information. It receives its input from the inferior colliculus and sends information out to the auditory cortex.

[edit] Relationship to auditory system

This nucleus is part of the thalamic relay system, even though it is located in the rostral midbrain and not the diencephalon (1). This nucleus is organized into three separate layers, and maintains the tonotopic organization of most other preceding nuclei. Most functions of the inferior colliculus are preserved, and are relayed to the auditory cortex.

[edit] See also

• auditory system

[edit] References

• 1) Kandel, et al Principles of Neuroscience. Fourth ed. pp 591-624. Copyright 2000, by McGraw-Hill Co.

v·d·e Sensory system: Auditory and Vestibular systems
Outer ear	pinna (Helix, Antihelix, Tragus, Antitragus, Earlobe) • Ear canal
Middle ear	Eardrum (Umbo) • Ossicles (Malleus, Incus & Stapes) • Stapedius • Tensor tympani • Eustachian tube (Torus tubarius)
Inner ear/Labyrinth	Bony labyrinth (Vestibule) • Membranous labyrinth Oval window • Helicotrema • Round window Cochlea: Spiral ganglion • Modiolus • Cochlear duct/scala media (Endolymph, Stria vascularis, Spiral ligament, Organ of Corti) • Scala vestibuli and Scala tympani (Perilymph) Reissner's/vestibular membrane • Basilar membrane • Tectorial membrane Organ of Corti: Hair cells • Stereocilia • Sulcus spiralis (externus, internus) • Limbus spiralis
Vestibular system	Static/translations: Utricle (Macula) - Saccule (Macula, Endolymphatic sac, Endolymphatic duct) - Kinocilium - Otolith Kinetic/rotations: Semicircular canals (Superior, Posterior, Horizontal) • Cupula • Ampullae (Crista ampullaris)
Brain (auditory)	Cochlear nerve VIII → Cochlear nuclei → Superior olivary nuclei → Lateral lemniscus → Inferior colliculi → Medial geniculate nuclei → Primary auditory cortex

This box: view • talk • edit Brain: diencephalon
Epithalamus	Pineal body • Habenula (Habenular nuclei)
Hypothalamus	anterior: Anterior hypothalamic nucleus • Paraventricular nucleus • Preoptic area • Supraoptic nucleus • Suprachiasmatic nucleus intermediate/middle/tuberal/pituitary: infundibulum • median eminence • arcuate nucleus • Ventromedial nucleus • Dorsomedial hypothalamic nucleus • Tuber cinereum, Pituitary gland (Anterior pituitary, Posterior pituitary) posterior/lateral: posterior nucleus • Mammillary body • Lateral nucleus other: Medial forebrain bundle
Subthalamus	Subthalamic nucleus • Zona incerta • Thalamic fasciculus • Lenticular fasciculus
Thalamus/nuclei	Ventral nuclear group (VA/VL, VP/VPM/VPL) • MD • AN • LNG (Pulvinar) • Intralaminar nucleus (Centromedian nucleus) • Midline nuclear group • Thalamic reticular nucleus • Metathalamus (MG, LG) • Interthalamic adhesion
Third ventricle	recesses: (Optic recess, Infundibular recess, Suprapineal recess, Pineal recess) • Hypothalamic sulcus
Other	Interventricular foramina • Optic chiasm • Subfornical organ • Mammillothalamic tract

This page uses content from the English-language version of Wikipedia. The original article was at Medial geniculate body. The list of authors can be seen in the page history. As with Psychology Wiki, the text of Wikipedia is available under the GNU Free Documentation License.