Hypoglossal trigone

Hypoglossal trigone
Rhomboid fossa. (Trigonum hypoglossi labeled at center left.)
Human caudal brainstem posterior view description (Trigonum nervi hypoglossi is #6)
Details
Identifiers
Latin	trigonum nervi hypoglossi
NeuroNames	hier-632
TA	A14.1.05.708
FMA	78489
*Anatomical terms of neuroanatomy* [edit on Wikidata]

In the upper part of the medulla oblongata, the hypoglossal nucleus approaches the rhomboid fossa, where it lies close to the middle line, under an eminence named the hypoglossal trigone.

Additional images

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

Anatomy of the medulla

afferent:	Solitary nucleus tract Dorsal respiratory group Gustatory nucleus Vestibular nuclei Lateral Medial Inferior

efferent:	Hypoglossal nucleus Nucleus ambiguus Dorsal nucleus of vagus nerve Inferior salivatory nucleus

Dorsal

Ventral

Dorsal	Sensory Sensory decussation Medial lemniscus Juxtarestiform body Ascending dorsal longitudinal fasciculus Medial longitudinal fasciculus Motor Descending dorsal longitudinal fasciculus Medial longitudinal fasciculus

Ventral	Descending tracts Olivocerebellar tract Rubro-olivary tract

Surface

Front	Pyramid decussation Anterior median fissure Anterolateral sulcus Olive Inferior olivary nucleus

Back	Posterior median sulcus Posterolateral sulcus Area postrema Vagal trigone Hypoglossal trigone Medial eminence Inferior cerebellar peduncle

Roof	Superior medullary velum Frenulum Inferior medullary velum Taenia

Floor	Upper Facial colliculus Locus coeruleus Lower Vagal trigone Hypoglossal trigone Area postrema Obex Medial eminence Sulcus limitans Fastigium

Apertures	Median/Magendie Lateral recess to Lateral/Luschka

Other	Rhomboid fossa Tela chorioidea

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