Coherence resonance in an autapse neuron model with time delay

Gautam C. Sethia; Jürgen Kurths; Abhijit Sen

doi:10.1117/12.724513

15 June 2007 Coherence resonance in an autapse neuron model with time delay

Gautam C. Sethia, Jürgen Kurths, Abhijit Sen

Proceedings Volume 6602, Noise and Fluctuations in Biological, Biophysical, and Biomedical Systems; 66020Q (2007) https://doi.org/10.1117/12.724513
Event: SPIE Fourth International Symposium on Fluctuations and Noise, 2007, Florence, Italy

Abstract

We study the noise activated dynamics of a model autapse neuron system that consists of a subcritical Hopf oscillator with a time delayed nonlinear feedback. The coherence of the noise driven pulses of the neuron exhibits a novel double peaked structure as a function of the noise amplitude. The two peaks correspond to separate optimal noise levels for excitation of single spikes and multiple spikes (bursts) respectively. The relative magnitudes of these peaks are found to be a sensitive function of time delay. The physical significance of our results and its practical implications in various real life systems are discussed.

Citation Download Citation

Gautam C. Sethia, Jürgen Kurths, and Abhijit Sen "Coherence resonance in an autapse neuron model with time delay", Proc. SPIE 6602, Noise and Fluctuations in Biological, Biophysical, and Biomedical Systems, 66020Q (15 June 2007); https://doi.org/10.1117/12.724513

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