Seasonal melatonin and luteinizing hormone rhythms in muskoxen at 52° N
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چکیده
منابع مشابه
Melatonin and human rhythms.
Melatonin signals time of day and time of year in mammals by virtue of its pattern of secretion, which defines 'biological night.' It is supremely important for research on the physiology and pathology of the human biological clock. Light suppresses melatonin secretion at night using pathways involved in circadian photoreception. The melatonin rhythm (as evidenced by its profile in plasma, sali...
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The master biological clock situated in the suprachiasmatic nuclei of the anterior hypothalamus plays a vital role in orchestrating the circadian rhythms of multiple biological processes. Increasing evidence points to a role of the biological clock in the development of depression. In seasonal depression and in bipolar disorders it seems likely that the circadian system plays a vital role in th...
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Experimental data show a close relationship among melatonin, circadian rhythms, and sleep. Low-dose melatonin treatment, increasing circulating melatonin levels to those normally observed at night, promotes sleep onset and sleep maintenance without changing sleep architecture. Melatonin treatment can also advance or delay the phase of the circadian clock if administered in the evening or in the...
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Levels of leisure-time physical activity and physical fitness are generally higher in the summer than in the winter months for most people living away from the equator. The notion that an abrupt increase in physical activity in the spring, after a period of relative inactivity, can trigger sudden cardiac events has not been confirmed. There are seasonal variations in the physiological responses...
متن کاملSeasonal variations in circadian rhythms of plasma melatonin in ruin lizards.
We examined melatonin profiles of ruin lizards in different seasons (spring, summer, and autumn) under light:dark (LD) and concomitant responses when transferred to continuous darkness (DD) to determine the degree to which previously reported seasonally dependent effects of pinealectomy on locomotor behavior are related to melatonin secretion. The amplitude of the melatonin rhythm and the amoun...
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ژورنال
عنوان ژورنال: Rangifer
سال: 1992
ISSN: 1890-6729
DOI: 10.7557/2.12.3.1045