Arcuate nucleus (medulla)

Arcuate nucleus (medulla)
Arcuate nucleus (medulla)
	Transverse section of medulla oblongata below the middle of the olive. ("Nucleus arcuatus" visible near bottom right.)
	Dissection of brain-stem. Lateral view. (Labels for "External arcuate fibers" and "Dorsal external arcuate fibers" visible at lower right.)
Details
Identifiers
Latin	nucleus arcuatus medullae oblongatae
NeuroNames	775
NeuroLex ID	birnlex_2635
TA98	A14.1.04.256
TA2	6016
FMA	72609
	Anatomical terms of neuroanatomy

In the medulla oblongata, the arcuate nucleus is a group of neurons located on the anterior surface of the medullary pyramids. These nuclei are the extension of the pontine nuclei. They receive fibers from the corticospinal tract and send their axons through the anterior external arcuate fibers and medullary striae to the cerebellum via the inferior cerebellar peduncle.

Arcuate nuclei are capable of chemosensitivity and have a proven role in the respiratory center controlling the breathing rate.

Additional images

Diagram showing the course of the arcuate fibers.
The formatio reticularis of the medulla oblongata, shown by a transverse section passing through the middle of the olive.

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