PMID: 9554574Apr 29, 1998Paper

Circadian parameters as individual characteristics

Journal of Biological Rhythms
J Aschoff

Abstract

Human circadian rhythms that are free running in temporal isolation can show an extreme variability of the sleep-wake cycle without the subject being aware of it. This is due mainly to a systematic adjustment of certain circadian time structures to the varying length of the "day": the perception of long time intervals in the range of 1 h and the intervals between meals have a strong positive correlation with the duration of wake time alpha, in contrast to the amount of hourly locomotor activity that is negatively correlated with alpha. So far, the dependence of locomotor activity, of the "1-h" intervals, and of the intermeal intervals on alpha is well documented for the data sets of single subjects. The present article demonstrates that the correlations found intraindividually also apply if data from several subjects are compared. If plotted as a function of the mean individual alpha, the individual means of "1-h" intervals and of the intermeal intervals show the same positive correlation and the means of locomotor activity show the same negative correlation with alpha as known from single individuals. It is to be concluded that each individual has its characteristic place on the regression lines that describe the dependence of...Continue Reading

References

Aug 1, 1979·Pflügers Archiv : European journal of physiology·R A Wever
May 1, 1978·Klinische Wochenschrift·J Aschoff
Jan 1, 1986·Journal of Biological Rhythms·J AschoffR A Wever
Jan 1, 1987·Physiology & Behavior·J GreenG P Smith
Apr 1, 1980·Klinische Wochenschrift·J Aschoff, R Wever
Jul 1, 1948·Endocrinology·N KLEITMAN, A RAMSAROOP

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Citations

Oct 5, 2011·Journal of Controlled Release : Official Journal of the Controlled Release Society·Shan-Yang Lin, Yoshiaki Kawashima
Jul 9, 2004·Neuroscience Research·Sayaka AritakeKiyohisa Takahashi
Jul 20, 2002·Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas·M P HidalgoM L F Chaves
May 4, 2005·Chronobiology International·James WaterhouseThomas Reilly

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