Results 131 to 140 of about 16,781 (179)
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The median preoptic area in cardiovascular reflex activity
Journal of the Autonomic Nervous System, 1985Two examples are used to illustrate the flexibility within the central servocontrol system that regulates blood volume and blood pressure. The variations are seen in the modification of components directed both towards short-term and long-term control. The preferential circuit used in the servocontrol system can and does change.
J W, Manning +3 more
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Dopamine, the medial preoptic area, and male sexual behavior
Physiology & Behavior, 2005The medial preoptic area (MPOA), at the rostral end of the hypothalamus, is important for the regulation of male sexual behavior. Results showing that male sexual behavior is impaired following MPOA lesions and enhanced with MPOA stimulation support this conclusion.
Juan M, Dominguez, Elaine M, Hull
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Nuclear uptake of testosterone in the dove preoptic area
Brain Research, 1983After intramuscular injection of tritiated testosterone, the tracer and its active metabolites, 5 alpha-dihydrotestosterone and estradiol-17 beta were taken up in vivo by preoptic cell nuclei in the male dove brain. An inactive metabolite, 5 beta-androstane-3 alpha-17 beta-diol, occurred only in the non-nuclear compartment.
T, Steimer, J B, Hutchison
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Medial preoptic area/anterior hypothalamus and sexual motivation
Scandinavian Journal of Psychology, 2003The medial preoptic area/anterior hypothalamus (MPOA/AH) is a brain site derived from proliferative zones from the diencephalon and telencephalon. It is probably this characteristic that makes this brain region participate in different physiological and behavioral functions.
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Hyperthermia induces c-fos expression in the preoptic area
Brain Research, 1993To identify thermosensitive areas of brain, we exposed rats to warm or cool environments and used the expression of the protein Fos as a marker of neuronal activity. In hyperthermic, heat-exposed rats, the median preoptic nucleus, and the medial and lateral preoptic areas had significantly more Fos immunoreactive neurons than control or cold-exposed ...
T E, Scammell, K J, Price, S M, Sagar
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Sexual Dimorphism in the Preoptic Area of the Rat
Science, 1971A quantitative evaluation of the relative distribution of synapses on dendritic shafts and spines serves to differentiate the neuropil of the preoptic area from that of the ventromedial hypothalamic nucleus; it also shows that the neuropil of the preoptic area is sexually dimorphic.
G, Raisman, P M, Field
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Sex differences in dendritic patterns in hamster preoptic area
Brain Research, 1977Sexual dimorphism is described in the dentritic field pattern of Golgi-stained neurons from the dorsomedial preoptic area of adult golden hamsters (Mesocricetus auratus). Data were obtained through a mathematical reconstruction of dentritic densities of neurons sampled from this area in males and females.
W T, Greenough +3 more
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Intermale social aggression: Suppression by medial preoptic area lesions
Physiology & Behavior, 1986The intermale social aggressive behavior of male rats cohabiting with a female rat was quantitatively scored weekly in response to the introduction of an unfamiliar intruding male. Resident male rats whose aggressiveness toward an intruder reached a criterion level were subjected to either sham lesions or bilateral lesions in the region of the medial ...
D J, Albert +4 more
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Preoptic area sleep-regulating mechanisms.
Archives italiennes de biologie, 2001Evidence is summarized for the existence of a sleep-regulating mechanism within the preoptic area of the hypothalamus, including the results of lesion, stimulation, and neuronal recording studies. Recent findings employing the c-fos protein immunohistochemical method, have localized putative sleep-regulatory neurons to the ventrolateral preoptic area ...
R, Szymusiak +3 more
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A sexually dimorphic nucleus in the quail preoptic area
Neuroscience Letters, 1986The cytoarchitectural analysis of the preoptic-anterior hypothalamic region of the Japanese quail reveals a sexual dimorphism in the total volume of the medial preoptic nucleus (significantly larger in males than in females). Different nuclei of the region (dorsal preopticus, suprachiasmaticus) do not show any statistically significant difference.
VIGLIETTI, Carla Maria +5 more
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