On the first night, researchers determined each person's biological rhythm using two standard measures : body core temperature and the rise in a hormone called melatonin.
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Problems with getting a good night's sleep spawned a specialized treatment field called chronobiology, the study of biological rhythms such as the sleep-wake cycle, 20 years ago.
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In both these institutions he also gave lectures on the " Cosmic Origin of the Biological Rhythms " and " Creativity and Unconscious of Carl Gustav Young ".
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Decoursey also became a member of the original Organizing Committees for both the Journal of Biological Rhythms and the Society for Research on Biological Rhythms ( SRBR ).
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Decoursey also became a member of the original Organizing Committees for both the Journal of Biological Rhythms and the Society for Research on Biological Rhythms ( SRBR ).
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Researchers concluded that social zeitgebers, like meal times and interactions with other people, can entrain biological rhythms in ways similar to those of other common zeitgebers like light.
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On the third and fourth nights, all subjects were told to stay in bed from midnight to noon and were allowed to sleep as their biological rhythms were measured.
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"Even entraining one blind person with melatonin is important, " said Charmane Eastman, director of the Biological Rhythms Research Laboratory at Rush Presbyterian-St . Lukes Medical Center in Chicago.
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In scores of experiments over the past four decades, researchers have studied innate biological rhythms by isolating human subjects in windowless laboratories without clocks, radios, or other external time cues.
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Didn't some Scandinavian country institute school hours that were compatible with the actual biological rhythms of teenagers ? Preceding contribs ) 10 : 55, 14 September 2009 ( UTC)
