Back to Journals » Clinical Interventions in Aging » Volume 3 » Issue 4

Chronomics, human time estimation, and aging

Authors Halberg F, Sothern RB, Cornélissen G, Czaplicki J

Published 5 December 2008 Volume 2008:3(4) Pages 749—760

DOI https://doi.org/10.2147/CIA.S4194

Review by Single-blind

Peer reviewer comments 1


Franz Halberg, Robert B Sothern, Germaine Cornélissen, Jerzy Czaplicki1

Halberg Chronobiology Center, University of Minnesota, Minneapolis, MN, USA; 1Institut de Pharmacologie et de Biologie Structurale CNRS, Université Paul Sabatier, Toulouse, France

Background: Circadian rhythm stage affects many outcomes, including those of mental aging.

Methods: Estimations of 1 minute ∼5 times/day for a year, 25 years apart, by a healthy male biomedical scientist (RBS), are analyzed by the extended cosinor.

Results: Cycles of a half-week, a week, ∼30 days, a half-year and a year, in self-assessed 1-minute estimation by RBS between 25 and 60 years of age in health, are mapped for the first time, compared and opposite effects are found. For RBS at 60 vs at 25 years of age, it takes less time in the morning around 10:30 (P < 0.001), but not in the evening around 19:30 (P = 0.956), to estimate 1 minute.

Discussion: During the intervening decades, the time of estimating 1 minute differed greatly, dependent on circadian stage, being a linear decrease in the morning and increase in the evening, the latter modulated by a ∼33.6-year cycle.

Conclusion: Circadian and infradian rhythm mapping is essential for a scrutiny of effects of aging. A ∼30-day and a circannual component apparent at 25 years of age are not found later; cycles longer than a year are detected. Rhythm stages await tests as markers for timing therapy in disease.

Keywords: circadian rhythm, mental function, time estimation

Creative Commons License This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution - Non Commercial (unported, v3.0) License. By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms.

Download Article [PDF]