Arcuate nucleus (medulla) explained

Arcuate nucleus (medulla)
Latin:	nucleus arcuatus medullae oblongatae

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.^[1]

They receive afferents from the corticospinal tract.

They in turn project efferents into the cerebellum through the inferior cerebellar peduncle as:

• the anterior internal arcuate fibers which pass along the midline before decussating near the rhomboid fossa (floor of fourth ventricle) then passing laterally as the medullary striae;
• the anterior external arcuate fibers.

External links

• • PubMed article

Notes and References

1. Book: Standring, Susan . Gray's Anatomy: The Anatomical Basis of Clinical Practice . . 2020 . 978-0-7020-7707-4 . 42th . New York . 445.e1 . 1201341621.