Brain: 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.)
Latin	nucleus arcuatus medullae oblongatae
Gray's	subject #187 767
NeuroNames	hier-772

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

[edit] 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.

[edit] External links

• MedEd at Loyola Neuro/frames/nlBSs/nl31fr.htm

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