Results 241 to 250 of about 44,238 (268)
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2022
Pineal gland secretes the hormone melatonin at night with a circadian rhythm. The synthesis and secretion of melatonin are stimulated at night by norepinephrine released by sympathetic postganglionic neurons projecting from the superior cervical ganglia.
Solange Castro, Afeche +2 more
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Pineal gland secretes the hormone melatonin at night with a circadian rhythm. The synthesis and secretion of melatonin are stimulated at night by norepinephrine released by sympathetic postganglionic neurons projecting from the superior cervical ganglia.
Solange Castro, Afeche +2 more
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Timekeeping by the Pineal Gland
Science, 1977N Acetyltransferase, an enzyme involved in melatonin production in the pineal gland, exhibits a circadian rhythm in chickens with peak values in the dark-time and low values during the light-time, commencing at lights-on.
Jerome B. Riebman +2 more
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The pineal gland and melatonin
2010Abstract The pineal gland transduces light–dark cycles for the timing of body rhythms by secretion of melatonin, an endogenous indoleamine derived from tryptophan, the concentrations of which in plasma and cerebrospinal fluid are up to 100 times higher at night than in the daytime. This exerts its effects through transmembrane, G-protein
J. Arendt, Timothy M. Cox
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The Pharmacology of the Pineal Gland
Annual Review of Pharmacology and Toxicology, 1976Only recently have a sufficient number of publications been available to legitimize a review of the pharmacology of the mammalian pineal organ. Two decades ago Kitay & Altschule reviewed the world literature on pineal physiology, which comprises several thousand papers, and concluded only that removal of the pineal, or administration of pineal extracts,
Richard J. Wurtman, Kenneth P. Minneman
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Philosophy, 1973
Until ten years ago biologists had almost no information about the function of the pineal body, though they supected that it was not that assigned to it by Descartes. It was often stated to be a mere vestige. We now know approximately what it does, and the sequence of the discovery makes an interesting case of scientific procedure.
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Until ten years ago biologists had almost no information about the function of the pineal body, though they supected that it was not that assigned to it by Descartes. It was often stated to be a mere vestige. We now know approximately what it does, and the sequence of the discovery makes an interesting case of scientific procedure.
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2009
Tumors of the pineal region represent approximately 1% of all brain tumors and 3–10% of pediatric brain tumors. A variety of tumors may involve this region, reflecting the complex histology and anatomy of the pineal gland. Tumors from the intrinsic pineocytes, designated pineal parenchymal tumors, show a spectrum of differentiation from the well ...
M. Beatriz S. Lopes +1 more
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Tumors of the pineal region represent approximately 1% of all brain tumors and 3–10% of pediatric brain tumors. A variety of tumors may involve this region, reflecting the complex histology and anatomy of the pineal gland. Tumors from the intrinsic pineocytes, designated pineal parenchymal tumors, show a spectrum of differentiation from the well ...
M. Beatriz S. Lopes +1 more
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1985
Since the first description of the pineal gland over 2000 years ago by the anatomist Herophilus, the function and reputation of this tiny organ have been associated more with philosophical conjecture than with scientific foundation. Early anatomists regarded the pineal gland as “the valve that controlled the flow of memories, stored in the rear brain ...
Edward A. Zbella, Norbert Gleicher
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Since the first description of the pineal gland over 2000 years ago by the anatomist Herophilus, the function and reputation of this tiny organ have been associated more with philosophical conjecture than with scientific foundation. Early anatomists regarded the pineal gland as “the valve that controlled the flow of memories, stored in the rear brain ...
Edward A. Zbella, Norbert Gleicher
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Pineal Gland Tumor Microenvironment
2020A wide and heterogeneous variety of tumors develop from the pineal gland. Pineal parenchymal tumors, germ cell tumors, and glial tumors represent most of them. The molecular profiles and tumor microenvironment play a key role in the development and progression of pineal gland tumors. Consequently, they represent important factors that may determine the
Szymon Baluszek +4 more
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1970
Publisher Summary This chapter discusses the effect of pineal gland on mammary development and activity. While no direct evidence of any effect on milk secretion was available, there was proof that the pineal can inhibit the pituitary and its luteotropic activity, and further studies on the pineal in relation to milk secretion were called for.
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Publisher Summary This chapter discusses the effect of pineal gland on mammary development and activity. While no direct evidence of any effect on milk secretion was available, there was proof that the pineal can inhibit the pituitary and its luteotropic activity, and further studies on the pineal in relation to milk secretion were called for.
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Chronobiology International, 2006
The pineal gland plays a key role in the control of the daily and seasonal rhythms in most vertebrate species. In mammals, rhythmic melatonin (MT) release from the pineal gland is controlled by the suprachiasmatic nucleus via the sympathetic nervous system.
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The pineal gland plays a key role in the control of the daily and seasonal rhythms in most vertebrate species. In mammals, rhythmic melatonin (MT) release from the pineal gland is controlled by the suprachiasmatic nucleus via the sympathetic nervous system.
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