Results 161 to 170 of about 33,968 (213)

MULTIPLE OSCILLATORS IN THE SUPRACHIASMATIC NUCLEUS

Chronobiology International, 2001
The suprachiasmatic nucleus (SCN) of the hypothalamus is the site of the pacemaker that controls circadian rhythms of a variety of physiological functions. Data strongly indicate the majority of the SCN neurons express self-sustaining oscillations that can be detected as rhythms in the spontaneous firing of individual neurons.
T, Shirakawa, S, Honma, K, Honma
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Efferent Signals of the Suprachiasmatic Nucleus

Journal of Biological Rhythms, 1993
It is well established that the mammalian suprachiasmatic nucleus (SCN) is a biological pacemaker that entrains the activity of organisms to their environment and controls circadian rhyth-micity. However, neither the nature of these coupling signal or signals from the SCN, nor their target or targets in the brain, are well understood ...
R, Silver, J, LeSauter
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Transplanted Suprachiasmatic Nucleus Determines Circadian Period

Science, 1990
The pacemaker role of the suprachiasmatic nucleus in a mammalian circadian system was tested by neural transplantation by using a mutant strain of hamster that shows a short circadian period. Small neural grafts from the suprachiasmatic region restored circadian rhythms to arrhythmic animals whose own nucleus had been ablated.
M R, Ralph, R G, Foster, F C, Davis, M, Menaker   +3 more
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Suprachiasmatic nucleus: a central autonomic clock

Nature Neuroscience, 1999
Circadian rhythms are daily changes in behavior and physiology produced by the suprachiasmatic nucleus (SCN) even in the absence of external stimuli1, although photic input from the retina to the SCN entrains these changes to a 24-hour cycle. The SCN modulates autonomic and neuroendocrine function to prepare for diurnal or nocturnal changes in behavior,
T, Ueyama, K E, Krout, X V, Nguyen, V, Karpitskiy, A, Kollert, T C, Mettenleiter, A D, Loewy   +6 more
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The Suprachiasmatic Nucleus

2010
Diurnal variations in physiology and behavior are ubiquitous in higher organisms. Although some rhythms are driven directly by geophysical cycles of light or temperature, most are generated by internal timers, commonly referred to as biological clocks.
Gabriella Lundkvist, Gene D. Block
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Neurogenesis of the hamster suprachiasmatic nucleus

Brain Research, 1990
Neurogenesis of the hypothalamic suprachiasmatic nucleus (SCN) was described in the Syrian hamster (Mesocricetus auratus) using tritiated [3H]thymidine autoradiography. Pregnant hamsters were given single intraperitoneal injections of [3H]thymidine at different times during prenatal development, and labeled cells were analyzed in the offspring of 4-5 ...
F C, Davis, R, Boada, J, LeDeaux
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Suprachiasmatic Nucleus Neurons Are Glucose Sensitive

Journal of Biological Rhythms, 1997
The suprachiasmatic nucleus (SCN) in the hypothalamus serves as the pacemaker for mammalian circadian rhythms. In a hamster brain slice preparation, the authors were able to record spontaneous activity from SCN cells for up to 4 days in vitro and verify a self-sustained rhythm in firing.
Hall, Adam C., Hoffmaster, Roselle M., Stern, Edra L., Harrington, Mary E., Bickar, David   +4 more
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Primary cell culture of suprachiasmatic nucleus

Brain Research Bulletin, 2003
In mammals, the suprachiasmatic nucleus (SCN) contains a biological clock that drives circadian rhythms in vivo and in vitro. Primary dissociated neuronal culture is a useful research tool, which allows cell-by-cell morphological and physiological study of the SCN.
Daan, Ren, Joseph D, Miller
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Resetting the suprachiasmatic nucleus clock

Frontiers in Bioscience, 2004
Recent research on the cellular basis of circadian rhythmicity has stressed the importance of clock genes for the maintenance of normal rhythmicity. There have been tremendous advances in our understanding of the inter-relationships of the various genes known to generate the rhythms.
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Functional Morphology of the Suprachiasmatic Nucleus

Frontiers in Neuroendocrinology, 1999
In mammals, the biological clock (circadian oscillator) is situated in the suprachiasmatic nucleus (SCN), a small bilaterally paired structure just above the optic chiasm. Circadian rhythms of sleep-wakefulness and hormone release disappear when the SCN is destroyed, and transplantation of fetal or neonatal SCN into an arrhythmic host restores ...
Y, Ibata, H, Okamura, M, Tanaka, Y, Tamada, S, Hayashi, N, Iijima, T, Matsuda, K, Munekawa, T, Takamatsu, Y, Hisa, Y, Shigeyoshi, F, Amaya   +11 more
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