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Noise-enhanced coupling between two oscillators with long-term plasticity.

Leonhard Lücken1, Oleksandr V Popovych2, Peter A Tass2,3,4

  • 1Weierstrass Institute for Applied Analysis and Stochastics, Berlin, Germany.

Physical Review. E
|April 15, 2016
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Summary
This summary is machine-generated.

Noise can paradoxically strengthen neural connections. This study shows that random fluctuations can stabilize strong bidirectional coupling between neurons, leading to an organized, counteractive response.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Biophysics

Background:

  • Spike-timing-dependent plasticity (STDP) is a key neural adaptation mechanism.
  • Synaptic connectivity is regulated by cell spiking behavior.
  • Biological systems are subject to natural fluctuations and noise.

Purpose of the Study:

  • To investigate the theoretical influence of noise on coupled neurons.
  • To explore how noise affects synaptic coupling strengths.
  • To understand the emergence of multistability in neural systems.

Main Methods:

  • Developed a phase description for two coupled neurons.
  • Derived a two-dimensional system for averaged coupling strength dynamics.
  • Numerically simulated coupled Hodgkin-Huxley neurons.

Main Results:

  • Identified multistability of coupling configurations, some noise-dependent.
  • Demonstrated that noise can stabilize strong bidirectional coupling.
  • Observed noise-induced organization and counteractive responses in neural coupling.

Conclusions:

  • Noise can paradoxically enhance neural coupling and promote specific configurations.
  • The system exhibits a high potential for multistability.
  • Noise can drive neural networks towards organized states, counteracting its desynchronizing effects.