preoptic area


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pre·op·tic re·gion

the most anterior part of the hypothalamus surrounding the anterior or preoptic part of the third ventricle and including the lamina terminalis; containing the lateral and medial preoptic nucleus continuous caudally with, respectively, the lateral and anterior hypothalamic nucleus; rostrally the preoptic region is continuous with the precommissural septum, laterally with the innominate substance.
Synonym(s): area preoptica [TA], preoptic area [TA]

preoptic area

(prē-ŏp-tĭk)
The anterior portion of the hypothalamus. It is above the optic chiasma and on the sides of the third ventricle.
References in periodicals archive ?
The role of apoptosis in sexual differentiation of the rat sexually dimorphic nucleus of the preoptic area.
The M-region, however, also receives afferents from the preoptic area, which might be involved in the final decision to start micturition.
The role of NA in thermoregulation in relation to REM sleep and its deprivation may be supported by the fact that it induces hypothermia by acting on [alpha]-1 adrenoceptors in the preoptic area (135) where such receptors have been identified on the thermosensitive neurons (136).
Also active were brain areas such as the ventral lateral preoptic area, which typically turn on only during sleep.
Ejaculation evoked by stimulation of the preoptic area in monkey.
Regulation of glutamic acid decarboxylase 65 and 67 gene expression by ovarian steroids: identification of two functionally distinct populations of GABA neurones in the preoptic area.
The most rostral slice (Ros) encompassed the preoptic area (POA), the mid slice (Mid) encompassed the paraventricular nucleus, and the caudal slice (Cau) contained the arcuate nucleus (ARC).
To determine the brain biochemistry that initiated these physiological and behavioral changes, the researchers examined neural tissue from the preoptic area offish in various states of dominance and subordination.
Specific brain areas such as the hypothalamic ventromedial nucleus (VMN) and the medial preoptic area (mPOA) are strictly involved in the elicitation of lordosis response (Etgen et al.
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.
Male rats receiving indomethacin as pups later showed signs of having unusually few neural connections in the preoptic area, an inner-brain structure previously implicated in sexual behavior, Amateau and McCarthy report in the June Nature Neuroscience.
A nitric oxide synthesis inhibitor administered into the medial preoptic area increases seminal emissions in an ex copula reflex test.