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Periodicity and chaos in electrically coupled Hindmarsh-Rose neurons

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Periodicity and chaos in electrically coupled Hindmarsh-Rose neurons

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Título Periodicity and chaos in electrically coupled Hindmarsh-Rose neurons
Autor Erichsen Junior, Rubem
Mainieri, Miguel Schumacher
Brunnet, Leonardo Gregory
Abstract The Hindmarsh-Rose HR system of equations is a model that captures the essential of the spiking activity of biological neurons. In this work we present an exploratory numerical study of the time activities of two HR neurons interacting through electrical synapses. The knowledge of this simple system is a first step towards the understanding of the cooperative behavior of large neural assemblies. Several periodic and chaotic attractors where identified, as the coupling strength is increased from zero until the perfect synchronization regime. In addition to the known phase locking synchronization at weak coupling, electrical synapses also allow for both in-phase and antiphase synchronization from moderate to strong coupling. A regime where the system changes apparently randomly between in-phase and antiphase locking evolves to a bistability regime, where both in-phase and antiphase periodic attractors are locally stable. At the strong coupling regime in-phase chaotic evolution dominates, but windows with complex periodic behavior are also present.
Contido em Physical review. E, Statistical, nonlinear, and soft matter physics. Vol. 74, no. 6 (Oct. 2006), 061906, 3 p.
Assunto Física
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/101626
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