Animal Clocks
نویسندگان
چکیده
منابع مشابه
Animal clocks: when science meets nature.
Daily rhythms of physiology and behaviour are governed by an endogenous timekeeping mechanism (a circadian 'clock'), with the alternation of environmental light and darkness synchronizing (entraining) these rhythms to the natural day-night cycle. Our knowledge of the circadian system of animals at the molecular, cellular, tissue and organismal levels is remarkable, and we are beginning to under...
متن کاملCircadian Biology: Clocks within Clocks
A small cluster of approximately 20,000 neurons in the ventral hypothalamus provide the body with key time-keeping signals and drive circadian rhythms. This circadian clock exhibits surprisingly complex substructures, with inputs from the retina, and outputs to other brain structures. Rather little is known of the neurotransmitters involved, or their regulation.
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متن کاملClocks within clocks: timing by coincidence detection
The many existent models of timing rely on vastly different mechanisms to track temporal information. Here we examine these differences, and identify coincidence detection in its most general form as a common mechanism that many apparently different timing models share, as well as a common mechanism of biological circadian, millisecond and interval timing. This view predicts that timing by coin...
متن کاملTopological difference of core regulatory networks induces different entrainment characteristics of plant and animal circadian clocks.
The plant circadian rhythm is quickly entrained to the change of a light stimulus but the mammalian circadian rhythm shows a relatively slow entrainment. Where does such a different entrainment feature of plants and mammals originate? To answer this question, we have investigated circadian regulatory networks of various species and identified the respective core structures of plants and animals...
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ژورنال
عنوان ژورنال: Nature
سال: 1959
ISSN: 0028-0836,1476-4687
DOI: 10.1038/184763a0