Emerging dynamics in neuronal networks of diffusively coupled hard oscillators

Authors:
L. Ponta;V. Lanza;M. Bonnin;F. Corinto
Affiliations:
Department of Physics, Politecnico di Torino, Italy;Department of Electronics, Politecnico di Torino, Italy;Department of Electronics, Politecnico di Torino, Italy;Department of Electronics, Politecnico di Torino, Italy
Venue:
Neural Networks
Year:
2011

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Abstract

Oscillatory networks are a special class of neural networks where each neuron exhibits time periodic behavior. They represent bio-inspired architectures which can be exploited to model biological processes such as the binding problem and selective attention. In this paper we investigate the dynamics of networks whose neurons are hard oscillators, namely they exhibit the coexistence of different stable attractors. We consider a constant external stimulus applied to each neuron, which influences the neuron's own natural frequency. We show that, due to the interaction between different kinds of attractors, as well as between attractors and repellors, new interesting dynamics arises, in the form of synchronous oscillations of various amplitudes. We also show that neurons subject to different stimuli are able to synchronize if their couplings are strong enough.