Results 41 to 50 of about 78 (77)
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Suprachiasmatic Nucleus Organization
Chronobiology International, 1998The suprachiasmatic nucleus (SCN) of the hypothalamus is a dominant circadian pacemaker in the mammalian brain controlling the rest-activity cycle and a series of physiological and endocrine functions to provide a foundation for the successful elaboration of adaptive sleep and waking behavior. The SCN is anatomically and functionally organized into two
Rae Silver, Robert Y. Moore
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MULTIPLE OSCILLATORS IN THE SUPRACHIASMATIC NUCLEUS
Chronobiology International, 2001The 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.
Sato Honma +2 more
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Identification of the suprachiasmatic nucleus in birds
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 2001Circadian rhythms are generated by an internal biological clock. The suprachiasmatic nucleus (SCN) in the hypothalamus is known to be the dominant biological clock regulating circadian rhythms in mammals. In birds, two nuclei, the so-called medial SCN (mSCN) and the visual SCN (vSCN), have both been proposed to be the avian SCN. However, it remains an
Shizufumi Ebihara +5 more
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Functional Morphology of the Suprachiasmatic Nucleus
Frontiers in Neuroendocrinology, 1999In 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 ...
Yasufumi Shigeyoshi +11 more
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Neurogenesis of the hamster suprachiasmatic nucleus
Brain Research, 1990Neurogenesis 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 ...
John LeDeaux +2 more
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2012
The suprachiasmatic nucleus (SCN), the master circadian clock of mammals, is composed of multiple circadian oscillator neurons. Most of them exhibit significant circadian rhythms in their clock gene expression and spontaneous firing when cultured in dispersed cells, as well as in an organotypic slice.
Ken-ichi Honma +6 more
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The suprachiasmatic nucleus (SCN), the master circadian clock of mammals, is composed of multiple circadian oscillator neurons. Most of them exhibit significant circadian rhythms in their clock gene expression and spontaneous firing when cultured in dispersed cells, as well as in an organotypic slice.
Ken-ichi Honma +6 more
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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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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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Brain Research Bulletin, 1993
Recovery of circadian drinking rhythms in suprachiasmatic nucleus (SCN)-lesioned rats after fetal SCN grafting was related to the immunocytochemical appearance and fiber outgrowth of vasopressin (VP)-, vasoactive intestinal polypeptide (VIP)-, and somatostatin (SOM)-containing neurons in the implants. At 4 weeks postgrafting, the first recovered animal
Henriëtte A. Griffioen +4 more
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Recovery of circadian drinking rhythms in suprachiasmatic nucleus (SCN)-lesioned rats after fetal SCN grafting was related to the immunocytochemical appearance and fiber outgrowth of vasopressin (VP)-, vasoactive intestinal polypeptide (VIP)-, and somatostatin (SOM)-containing neurons in the implants. At 4 weeks postgrafting, the first recovered animal
Henriëtte A. Griffioen +4 more
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Beyond the Suprachiasmatic Nucleus
Chronobiology International, 2003The suprachiasmatic nucleus is the master oscillator controlling circadian rhythms in mammals. Yet extensive temporal restructuring of behavior can occur without participation of the suprachiasmatic nucleus. This raises questions about current thinking about how to cope with jet lag and shift work.
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Transplantation of the Suprachiasmatic Nucleus in the Rat
1987Restoration of the circadian rhythmicity in wheel-running activity was shown in rats with bilateral suprachiasmatic nuclei (SCN) lesions, after transplantation of the neonatal SCN into the wall of the third ventricle. Free-running circadian rhythms of the wheel-running activity were recorded in young adult rats at least for a month under constant dark ...
Itsuko Nihonmatsu +2 more
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