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Circadian temperature and melatonin rhythms, sleep, and neurobehavioral function in humans living on a 20-h day

American journal of physiology. Regulatory, integrative and comparative physiology, 1999-10, Vol.277 (4), p.1152-R1163 [Peer Reviewed Journal]

ISSN: 0363-6119 ;ISSN: 0002-9513 ;EISSN: 1522-1490 ;EISSN: 2163-5773 ;DOI: 10.1152/ajpregu.1999.277.4.r1152 ;PMID: 10516257

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  • Title:
    Circadian temperature and melatonin rhythms, sleep, and neurobehavioral function in humans living on a 20-h day
  • Author: Wyatt, James K ; Cecco, Angela Ritz-De ; Czeisler, Charles A ; Dijk, Derk-Jan
  • Subjects: Adult ; Behavior - physiology ; Body Temperature - physiology ; Circadian Rhythm ; Female ; Humans ; Life Sciences (General) ; Male ; Melatonin - blood ; Nervous System Physiological Phenomena ; Photoperiod ; Sleep - physiology ; Sleep Stages - physiology ; Space life sciences ; Wakefulness - physiology
  • Is Part Of: American journal of physiology. Regulatory, integrative and comparative physiology, 1999-10, Vol.277 (4), p.1152-R1163
  • Description: Circadian, Neuroendocrine and Sleep Disorders Section, Division of Endocrinology, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115 The interaction of homeostatic and circadian processes in the regulation of waking neurobehavioral functions and sleep was studied in six healthy young subjects. Subjects were scheduled to 15-24 repetitions of a 20-h rest/activity cycle, resulting in desynchrony between the sleep-wake cycle and the circadian rhythms of body temperature and melatonin. The circadian components of cognitive throughput, short-term memory, alertness, psychomotor vigilance, and sleep disruption were at peak levels near the temperature maximum, shortly before melatonin secretion onset. These measures exhibited their circadian nadir at or shortly after the temperature minimum, which in turn was shortly after the melatonin maximum. Neurobehavioral measures showed impairment toward the end of the 13-h 20-min scheduled wake episodes. This wake-dependent deterioration of neurobehavioral functions can be offset by the circadian drive for wakefulness, which peaks in the latter half of the habitual waking day during entrainment. The data demonstrate the exquisite sensitivity of many neurobehavioral functions to circadian phase and the accumulation of homeostatic drive for sleep. circadian rhythms; performance; body temperature; alertness; memory
  • Publisher: Legacy CDMS
  • Language: English
  • Identifier: ISSN: 0363-6119
    ISSN: 0002-9513
    EISSN: 1522-1490
    EISSN: 2163-5773
    DOI: 10.1152/ajpregu.1999.277.4.r1152
    PMID: 10516257
  • Source: NASA Technical Reports Server
    MEDLINE
    Alma/SFX Local Collection
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