Epidemiology of the human circadian clock.

@article{Roenneberg2007EpidemiologyOT,
  title={Epidemiology of the human circadian clock.},
  author={Till Roenneberg and Tim Kuehnle and Myriam Juda and Thomas Kantermann and Karla Viviani Allebrandt and Marijke C. M. Gordijn and Martha Merrow},
  journal={Sleep medicine reviews},
  year={2007},
  volume={11 6},
  pages={
          429-38
        }
}

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References

SHOWING 1-10 OF 58 REFERENCES
Life between Clocks: Daily Temporal Patterns of Human Chronotypes
TLDR
It is predicted that the timing of sleep has changed during industrialization and that a majority of humans are sleep deprived during the workweek, and the implications are far ranging concerning learning, memory, vigilance, performance, and quality of life.
Familial advanced sleep-phase syndrome: A short-period circadian rhythm variant in humans
TLDR
Three kindreds with a profound phase advance of the sleep–wake, melatonin and temperature rhythms associated with a very short τ represent a well-characterized familial circadian rhythm variant in humans and provide a unique opportunity for genetic analysis of human circadian physiology.
CONTRIBUTION OF CIRCADIAN PHYSIOLOGY AND SLEEP HOMEOSTASIS TO AGE-RELATED CHANGES IN HUMAN SLEEP
TLDR
The internal circadian phase advance of awakening, as well as the age-related reduction in sleep consolidation, appears related to an age- related reduction in the promotion of sleep by the circadian pacemaker during the biological night in combination with a reduced homeostatic pressure for sleep.
The Circadian System of Man
TLDR
Despite the fact that Cortisol, like many other hormones, is secreted in a highly variable sequence of episodes, a clear circadian pattern emerges in each curve, averaged from the data on n subjects, and there is perfect correspondence in phase and relative amplitude between the curves.
Integration of human sleep-wake regulation and circadian rhythmicity.
TLDR
Findings on the physiological and molecular-genetic correlates of circadian sleep disorders suggest that the timing of the sleep-wake cycle and circadian rhythms is closely integrated but is, in part, regulated differentially.
Relationship of endogenous circadian melatonin and temperature rhythms to self-reported preference for morning or evening activity in young and older people.
TLDR
An association between circadian phase, the relationship between the sleep-wake cycle and circadianphase, and morningness-eveningness in young adults is demonstrated and age-related changes in phase angle cannot be attributed fully to an age- related shift toward morningness.
CIRCADIAN RHYTHMICITY OF CORTISOL AND BODY TEMPERATURE: MORNINGNESS-EVENINGNESS EFFECTS
The purpose of this study was to describe and compare the circadian rhythm of body temperature and cortisol, as well as self-reported clock times of sleep onset and offset on weekdays and weekends in
Genetics of the sleep-wake cycle and its disorders.
Association of intrinsic circadian period with morningness-eveningness, usual wake time, and circadian phase.
TLDR
A chronobiological mechanism by which the biological clock of morning types may be set to an earlier hour is explored, demonstrating that a fundamental property of the circadian pacemaker is correlated with the behavioral trait of morningness-eveningness.
...
1
2
3
4
5
...