In the medulla oblongata, the arcuate nucleus is a group of neurons located on the anterior surface of the medullary pyramids.

[1] They receive afferents from the corticospinal tract.

[citation needed] They in turn project efferents into the cerebellum through the inferior cerebellar peduncle as:[1] Arcuate nuclei are capable of chemosensitivity and have a proven role in the respiratory center controlling the breathing rate.

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