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Thermoregulation is impaired in an environment without circadian time cuesThirteen adult male squirrel monkeys were restrained to a metabolism chair for periods of two or more weeks within an isolation chamber having controlled environmental lighting and ambient temperature. The monkeys were subjected to mild 6-hour cold exposures at all circadian phases of the day. It was found that a prominent circadian rhythm in body temperature, regulated against mild cold exposure, was present in those monkeys synchronized in a 24-hour light-dark cycle. Cold exposures were found to produce decreased core body temperatures when the circadian rhythms were free running or when environmental time indicators were not present. It is concluded that the thermoregulating system depends on the internal synchronization of the circadian time-keeping system.
Document ID
19780040909
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Fuller, C. A.
(Harvard Medical School Boston, MA, United States)
Sulzman, F. M.
(Harvard Medical School Boston, MA, United States)
Moore-Ede, M. C.
(Harvard University Harvard Medical School, Boston, Mass., United States)
Date Acquired
August 9, 2013
Publication Date
February 17, 1978
Publication Information
Publication: Science
Volume: 199
Subject Category
Life Sciences (General)
Accession Number
78A24818
Funding Number(s)
CONTRACT_GRANT: NIH-GN-22085
CONTRACT_GRANT: NSG-9045
CONTRACT_GRANT: NSF PCM-76-19943
Distribution Limits
Public
Copyright
Other

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