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Circadian Rhythms and Gene Regulation02:19

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Human Circadian Phenotyping and Diurnal Performance Testing in the Real World
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Concepts in human biological rhythms.

Alain Reinberg1, Israel Ashkenazi

  • 1Unité de Chronobiologie, Fondation Adolphe de Rothschild, Paris, France; Department of Human Genetics and Molecular Medicine, School of Medicine, Tel Aviv University, Ramat Aviv, Israel.

Dialogues in Clinical Neuroscience
|October 29, 2011
PubMed
Summary

Human biological clocks exhibit unique temporal organization, differing from animal models. We introduce "allochronism" for asymptomatic desynchronization and "dyschronism" for symptomatic alterations, highlighting variability in circadian rhythms.

Keywords:
affective disorderallochronismbiological rhythmdesynchronizationdyschronismshift worktemporal organization

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Area of Science:

  • Chronobiology
  • Human temporal organization
  • Biological rhythms

Background:

  • Biological rhythms are adaptive responses to environmental cycles.
  • Existing models of biological clocks are primarily derived from plant and animal studies.
  • Human biological clock dynamics are not fully explained by current models.

Purpose of the Study:

  • To review phenomena unique to human chronobiology.
  • To explore functional advantages and desynchronization issues in human temporal organization.
  • To introduce concepts of allochronism and dyschronism for human biological rhythm variations.

Main Methods:

  • Review of human chronobiology phenomena.
  • Analysis of circadian rhythm period (τ) variability.
  • Discussion of right- and left-hand rhythm differences and genetic models.

Main Results:

  • Human biological clocks possess unique characteristics not fully explained by animal models.
  • Desynchronization of rhythms, common in shift workers, can be asymptomatic ('allochronism') or symptomatic ('dyschronism').
  • The dian-circadian model is proposed to explain interindividual differences in biological rhythm periods.

Conclusions:

  • Human temporal organization has unique features requiring specific study.
  • Distinguishing between asymptomatic (allochronism) and symptomatic (dyschronism) desynchronization is crucial.
  • Understanding human biological clock variability is essential for health and well-being.