Noise induced dynamics and subthreshold oscillations

Dmitry Setsinsky; Alexander Shishkin; Ludmila Ryazaniva; Dmitry Postnov

doi:10.1117/12.590290

29 March 2005 Noise induced dynamics and subthreshold oscillations

Dmitry Setsinsky, Alexander Shishkin, Ludmila Ryazaniva, Dmitry Postnov

Proceedings Volume 5696, Complex Dynamics and Fluctuations in Biomedical Photonics II; (2005) https://doi.org/10.1117/12.590290
Event: SPIE BiOS, 2005, San Jose, CA, United States

Abstract

In order to treat the effect of subthreshold dynamics on noisy neuron behavior we focus on parameters region of FitzHugh-Nagumo model close to the so called canard-explosion. Such parameter region corresponds to transition from excitable regime to continuous spiking. We observe the number of noise-induced effects, such as (i) noise-induced stabilization of firing frequency; (ii) noise-induced suppression of spiking; (iii) noise-induced chaos. We show that for small ensemble of resonator-type neurons activated by noise there is the global maxima of firing frequency at some optimal noise intensity. The underlying mechanisms of such behavior are closely related to noise-activated subthreshold dynamics.

Citation Download Citation

Dmitry Setsinsky, Alexander Shishkin, Ludmila Ryazaniva, and Dmitry Postnov "Noise induced dynamics and subthreshold oscillations", Proc. SPIE 5696, Complex Dynamics and Fluctuations in Biomedical Photonics II, (29 March 2005); https://doi.org/10.1117/12.590290

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