Bifurcation analysis of a two-neuron central pattern generator model for both oscillatory and convergent neuronal activities

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Abstract

The neural oscillator model proposed by Matsuoka is a piecewise affine system that exhibits distinctive periodic solutions. Although such typical oscillation patterns have been widely studied, little is understood about the dynamics of convergence to certain fixed points and bifurcations between the periodic orbits and fixed points in this model. We performed fixed point analysis on a two-neuron version of the Matsuoka oscillator model, the result of which explains the mechanism of oscillation and the discontinuity-induced bifurcations such as subcritical/supercritical Hopf-like, homoclinic-like and grazing bifurcations. Furthermore, it provided theoretical predictions concerning a logarithmic oscillation-period scaling law and noise-induced oscillations observed around those bifurcations. These results are expected to underpin further investigations into oscillatory and transient neuronal activities concerning central pattern generators.

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Muramatsu, K., & Kori, H. (2024). Bifurcation analysis of a two-neuron central pattern generator model for both oscillatory and convergent neuronal activities. Chaos, 34(9). https://doi.org/10.1063/5.0220075

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