Arcuate nucleus (medulla)

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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
Dorlands/Elsevier	n_11/12580396

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.

[edit] External links

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

v • d • e Brain: rhombencephalon (hindbrain)
Myelencephalon/medulla	Arcuate nucleus of medulla, Solitary nucleus, Hypoglossal nucleus, Nucleus ambiguus, Olivary body, Inferior olivary nucleus, Cuneate nucleus, Accessory cuneate nucleus, Gracile nucleus, Inferior salivatory nucleus, Raphe nuclei (Obscurus, Magnus, Pallidus), Area postrema, Posterior nucleus of vagus nerve, Reticular formation (Gigantocellular nucleus, Parvocellular reticular nucleus, Ventral reticular nucleus, Lateral reticular nucleus, Paramedian reticular nucleus), Pyramid (Decussation)
Metencephalon/cerebellum	Vermis, Flocculus, Arbor vitae
Metencephalon/pons	Pontine tegmentum, Superior salivary nucleus, Trapezoid body, Pontine nuclei (Superior olivary nucleus, Trigeminal nerve nuclei, Abducens nucleus, Facial motor nucleus, Cochlear nuclei, Vestibular nuclei), Locus ceruleus, Paramedian pontine reticular formation, Median raphe nucleus - Reticular formation (Caudal pontine reticular nucleus, Oral pontine reticular nucleus, Tegmental pontine reticular nucleus)
Fourth ventricle	Obex, Median aperture