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Chaos in multi-looped negative feedback systems.

L Glass1, C P Malta

  • 1Department of Physiology, McGill University, Montreal, Quebec, Canada.

Journal of Theoretical Biology
|July 24, 1990
PubMed
Summary
This summary is machine-generated.

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Normal physiological fluctuations may arise from deterministic chaos in non-linear control systems. These systems, featuring multiple negative feedback loops, exhibit complex behaviors like period-doubling and chaos.

Area of Science:

  • Physiology
  • Non-linear Dynamics
  • Control Systems Theory

Background:

  • Non-linear control systems with multiple negative feedback loops are known to exhibit complex dynamical behaviors.
  • These behaviors include periodicity, quasiperiodicity, and period-doubling bifurcations, which can lead to chaotic dynamics.

Purpose of the Study:

  • To explore the potential for deterministic chaos to explain normal physiological fluctuations.
  • To discuss the implications of chaotic dynamics in multi-looped negative feedback systems within biological contexts.

Main Methods:

  • Theoretical analysis of non-linear control systems.
  • Examination of feedback loop dynamics.
  • Discussion of bifurcation theory and chaos.

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Main Results:

  • Non-linear systems with multiple negative feedback loops can generate chaotic behavior.
  • Deterministic chaos provides a potential mechanism for seemingly random physiological fluctuations.

Conclusions:

  • Normal physiological variability may not always be random but could stem from deterministic chaotic processes.
  • Understanding these chaotic dynamics is crucial for a comprehensive view of physiological regulation.