arcuate nucleus


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Related to arcuate nucleus: Preoptic nucleus, paraventricular nucleus

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
References in periodicals archive ?
A-C) Representative immunolabelling (upper panels) and quantification (lower panels) of the number of kisspeptin- immunoreactive neurons in the RP3V (A) and fiber density in the RP3V (B) and arcuate nucleus (C) in wild type mice.
Rats on a fatty diet showed signs of cellular damage in a hypothalamic aggregation of neurons known as the arcuate nucleus.
Fasting induces a large, leptin-dependent increase in the intrinsic action potential frequency of orexigenic arcuate nucleus neuropeptide Y/Agouti-related protein neurons.
Cells of the arcuate nucleus and ventromedial nucleus of the ovariectomized ewe that respond to estrogen: A study using Fos immunohistochemistry.
However, a baby with a flawed arcuate nucleus might lack this protective mechanism and succumb to SIDS.
Expression of melanocortin MC3 and MC4 receptor mRNAs by neuropeptide Y neurons in the rat arcuate nucleus.
Various nuclei of the hypothalamus including the paraventricular nucleus (PVN), medial preoptic area (MPA), arcuate nucleus (AN), median eminence, suprachiasmatic nucleus (SCN), and the substantia nigra (SN) were microdissected by the Palkovits's micropunch technique (MohanKumar et al.
The arcuate nucleus, located in the ventromedial hypothalamus, in addition to the pituitary gland, contains all the b-endorphin cells in the brain.