arcuate nucleus

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ar·cu·ate nu·cle·us

[TA]
2. a cell group in the hypothalamus, located in the lowest part of the infundibulum adjacent to the median eminence. Synonym(s): nucleus arcuatus of medulla oblongata [TA]
3. a variable assembly of small cell groups, probably outlying components of the pontine nuclei, on the anterior and medial aspects of the pyramid in the medulla oblongata.
Synonym(s): nucleus arcuatus [TA]

arcuate nucleus

n.
Any of various specialized groups of nerve cells in the medulla oblongata, thalamus, or hypothalamus of the brain.

arcuate nucleus

A hypothalamic nucleus in the ventral wall of the third ventricle near the pituitary stalk. The arcuate nucleus produces inhibiting and releasing factors (adrenocorticotrophic hormone, beta-lipotrophic hormone, and beta-endorphin) for pituitary hormones.
Synonym: infundibular nucleus
See also: nucleus