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Related Experiment Videos

Fault tolerance in noise-enhanced propagation.

R Perazzo1, L Romanelli, R Deza

  • 1Centro de Estudios Avanzados, Universidad de Buenos Aires, Uriburu 950, 1114 Buenos Aires, Argentina. perazzo@cea.uba.ar

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|November 23, 2000
PubMed
Summary

This study models neuronal synaptic transmission using coupled bistable oscillators and noise. A critical coupling value reestablishes signal propagation past a "dead neuron," demonstrating fault tolerance.

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Area of Science:

  • Neuroscience
  • Complex Systems
  • Nonlinear Dynamics

Background:

  • Synaptic transmission is crucial for neuronal communication.
  • Bistable oscillators with noise can transmit signals.
  • Understanding signal propagation in noisy networks is vital.

Purpose of the Study:

  • To investigate signal propagation in a chain of coupled bistable oscillators mimicking synaptic transmission.
  • To analyze the effect of localized noise on signal propagation.
  • To identify emergent properties related to fault tolerance.

Main Methods:

  • Numerical simulations of a one-way coupled chain of bistable oscillators.
  • Application of uncorrelated additive noise to all nodes except the central one.
  • Systematic variation of coupling strength and noise intensity.

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Main Results:

  • Signal propagation is interrupted below a critical coupling value when the central node is noise-free.
  • Propagation is reestablished above this critical coupling value.
  • Fault-tolerant behavior, enhancing reliability, emerges from the system.

Conclusions:

  • The system exhibits emergent fault tolerance, similar to biological synapses.
  • Coupling strength plays a critical role in overcoming signal interruption.
  • This model provides insights into robust signal transmission in biological and artificial systems.