Related Experiment Video
Updated: Jul 2, 2026
06:53
Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
Published on: November 11, 2016
Emergent Multidien Cycles From Partial Circadian Synchrony
Marc G Leguia1,2, Maxime O Baud3, Ralph G Andrzejak2
1Life Sciences Department, Barcelona Supercomputing Center, Barcelona 08034, Spain mgrauleg@gmail.com.
Eneuro
|June 30, 2026
Summary
Multidien cycles, longer biological rhythms, may emerge from the interaction of circadian oscillators, not independent clocks. This provides a new model for understanding health and disease rhythms.
Area of Science:
- Chronobiology
- Non-linear dynamics
- Systems biology
Background:
- Circadian rhythms are well-understood, but longer 'multidien' biological cycles are increasingly recognized for their importance in health and disease.
- The mechanisms generating multidien cycles are unclear, and they may not be genetically encoded due to their variability.
Purpose of the Study:
- To propose and theoretically demonstrate that multidien cycles can emerge from the interaction of partially coupled circadian oscillators.
- To investigate how network dynamics and coupling parameters influence the emergence of these longer biological rhythms.
Main Methods:
- Utilized a theoretical ring model of coupled circadian oscillators.
- Analyzed the evolution of synchrony within the network over time.
- Studied the impact of variations in coupling parameters on emergent periodicities.
Main Results:
- A robust, approximately weekly free-running period emerged from the network dynamics.
- Variations in coupling parameters generated additional multidien cycles with periodicities observed across species.
- Demonstrated the emergence of multi-day rhythms through chimera states in a biological network.
Conclusions:
- Partial synchrony among circadian oscillators provides a credible hypothesis for generating multidien cycles.
- This model offers a new mechanistic explanation for long-timescale biological phenomena in health and disease.
- Findings link chronobiology with non-linear dynamics, offering a novel theoretical foundation for multidien rhythms relevant to multiple scientific fields.
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