Nonstationary chimeras in a neuronal network

Authors: Zhouchao Wei, Fatemeh Parastesh, Hamed Azarnoush, Sajad Jafari, Dibakar Ghosh, Matjaž Perc, Mitja Slavinec

Publication date: 2018

Journal: Europhysics Letters

Publisher: IOP Publishing

Description: Chimeras are special states that are composed of coexisting spatial domains of coherent and incoherent dynamics, which typically emerge in identically coupled oscillators. In this paper, we study a network of nonlocally coupled Hindmarsh-Rose neurons that are subject to an alternating current. We show that chimera states emerge when the neurons are connected through electrical synapses. The considered model has two coexisting attractors, namely a limit cycle and a chaotic attractor, to which the dynamics converges in dependence on the initial conditions. While earlier research reported the existence of chimeras in Hindmarsh-Rose neuronal networks mainly through chemical synapses, here we show that an alternating current in an electrically coupled network can also evoke chimeras, whereby the spatial positions of coherent and incoherent domains vary with time. Remarkably, we also observe chimera …

Total citations: 64

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Nonstationary chimeras in a neuronal network

Nonstationary chimeras in a neuronal network

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Nonstationary chimeras in a neuronal network