Hypoglossal nucleus

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Hypoglossal nucleus
Gray694.png
Section of the medulla oblongata. (Hypoglossal nucleus visible top left.)
Gray696.svg
The cranial nerve nuclei schematically represented; dorsal view. Motor nuclei in red; sensory in blue. (XII labeled at bottom left.)
Details
Identifiers
Latinnucleus nervi hypoglossi
NeuroNames757
NeuroLex IDbirnlex_2644
TAA14.1.04.227
FMA54505
Anatomical terms of neuroanatomy

The hypoglossal nucleus is a cranial nerve nucleus, and it extends the length of the medulla, and being a motor nucleus, is close to the midline. In the open medulla, it is visible as what is known as the hypoglossal trigone, a raised area (medial to the vagal trigone) protruding slightly into the fourth ventricle.

In the closed medulla, the gracile and cuneate nuclei lie posteriorly, which means the nucleus is not as close to the back of the medulla as in the open medulla. It is, however, still close to the midline.

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