arcuate nucleus


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Related to arcuate nucleus: Preoptic nucleus, paraventricular nucleus

ar·cu·ate nu·cle·us

[TA]
1. Synonym(s): nucleus arcuatus of intermediate hypothalamic area [TA], nucleus periventricularis posterior [TA], posterior periventricular nucleus [TA]Synonym(s): arcuate nucleus of thalamus
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
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References in periodicals archive ?
Elevated Kiss-1 expression in the arcuate nucleus prior to the cyclic preovulatory gonadotropin-releasing hormone/luteinising hormone surge in the ewe suggests a stimulatory role for kisspeptin in estrogen-positive feedback.
Evidence that estrogen mediates the positive feedback effect on GnRH
Kinney noted that the arcuate nucleus forms between 5 and 13 weeks' gestation and is typically completed by week 16.
Brainstem anomaly may be culprit in SIDS subset: maternal smoking tied to abnormality. (Affects Ability to Detect Hypoxia)
Fasting induces a large, leptin-dependent increase in the intrinsic action potential frequency of orexigenic arcuate nucleus neuropeptide Y/Agouti-related protein neurons.
Effect of 24 h fasting on gene expression of AMPK, appetite regulation peptides and lipometabolism related factors in the hypothalamus of broiler chicks
As the brain damage became chronic, the arcuate nucleus appeared to lose its sensitivity to hormonal cues about how much body fat exists, Schwartz says.
Tricks foods play: what you eat may fool your brain into packing on the pounds

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