Results 221 to 230 of about 1,007,590 (275)
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Topography of median eminence somatostatinergic innervation
Brain Research, 1981Somatostatin (SRIF) in the central nervous system is mostly concentrated in the median eminence (ME). Immunocytochemical methods have revealed high densities of SRIF-positive perikarya between the preoptic area and the periventricular nucleus of the hypothalamus (NPE).
J, Epelbaum +4 more
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Evidence for GABAB autoreceptors in median eminence
European Journal of Pharmacology, 1985The effect of the selective GABAB receptor agonist baclofen was examined on stimulus-induced release of [3H]GABA from crude synaptosomal preparations of median eminence (ME) and pituitary neurointermediate lobe (NI). Baclofen stereospecifically inhibited release of [3H]GABA in a concentration-dependent manner from ME but had no effect in NI. The effect
R A, Anderson, R, Mitchell
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Median eminence nitric oxide signaling
Brain Research Reviews, 2000It is becoming increasingly clear that nitric oxide (NO), an active free radical formed during the conversion of arginine to citrulline by the enzyme NO synthase (NOS), is a critical neurotransmitter and biological mediator of the neuroendocrine axis.
V, Prevot +3 more
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The freeze-fractured median eminence
Cell and Tissue Research, 1983The neurohemal contact area of the median eminence was examined in adult, young, neonatal, and fetal rats in freeze-fracture preparations. While no specializations of the membranes of axonic terminals abutting on the perivascular space was observed, adjacent areas of the same membranes are rich in signs of hormone release.
B G, Monroe, E M, Holmes
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Neuropeptides in the median eminence☆
Neurochemistry International, 1986The presence and possible sources of more than 30 neuropeptides in the median eminence are summarized. The median eminence is the brain area which contains neuropeptides in the highest number and in the highest concentrations in the central nervous system. This area constitutes the final common pathway for signals from the brain to the pituitary.
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The tanycyte of the rat median eminence
Cell and Tissue Research, 1979The present ultrastructural study proves the existence of nerve terminals closely apposed to the plasmalemmata of tanycytes in the rat median eminence. Several of these "axo-tanycytic" endings display remarkable accumulations of agranular endoplasmic reticulum in the form of pleomorphic vesicles which are closely apposed on either side of the plasma ...
D E, Scott, W K, Paull
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Ultrastructure of the median eminence of the rat
Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1966The ependymal cells bordering the median eminence to the third ventricle are characterised by many microvillus-like projections and bulbous cell processes of the luminal plasma membrane. The latter contain many vesicles 500–1,000 A in diameter. Cilia with 9+2 fibrillar pattern are seen occasionally.
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Transport Capacity of Median Eminence
Neuroendocrinology, 2008The capacity for and mechanism of transport of thyroxine (T4) by the median eminence has been examined in vivo. Following an intravenous injection of 125I-thyroxine, the median eminence accumulates more hormone than either the anterior or posterior pituitary, although it does not achieve a tissue:plasma ratio greater than 1. The uptake of T<sub>4&
Ann-Judith Silverman +2 more
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Alterations in the Countercurrent Gradient by Lesions in the Median Eminence
Nature, 1966IT is well established that hypertonic urine is produced in. the kidney by means of a countercurrent multiplier system and that the formation of such urine requires a hyper-osmotic medullary interstitium. It is accepted that anti-diuretic hormone regulates the osmolality of the urine so produced by altering the permeability characteristics of" the ...
R L, Malvin, M M, Fusco
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Neuropeptides in the median eminence: Their sources and destinations
Peptides, 1982By radioimmunoassay and immunocytochemical techniques, 14 neuropeptides have been measured and localized in the rat median eminence. Neuropeptides with inhibitory or stimulatory effects on the anterior pituitary hormones as well as posterior pituitary hormones are present in the median eminence in the highest concentrations of the central nervous ...
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