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Proceedings Paper

Noise induced dynamics and subthreshold oscillations
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Paper 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.

Paper Details

Date Published: 29 March 2005
PDF: 10 pages
Proc. SPIE 5696, Complex Dynamics and Fluctuations in Biomedical Photonics II, (29 March 2005); doi: 10.1117/12.590290
Show Author Affiliations
Dmitry Setsinsky, Saratov State Univ. (Russia)
Alexander Shishkin, Saratov State Univ. (Russia)
Ludmila Ryazaniva, Saratov State Univ. (Russia)
Dmitry Postnov, Saratov State Univ. (Russia)


Published in SPIE Proceedings Vol. 5696:
Complex Dynamics and Fluctuations in Biomedical Photonics II
Valery V. Tuchin, Editor(s)

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