The combined effect of chemical and electrical synapses in small Hindmarsch-Rose neural networks on synchronisation and on the rate of information

Details The combined effect of chemical and electrical synapses in small Hindmarsch-Rose neural networks on synchronisation and on the rate of information The combined effect of chemical and electrical synapses in small Hindmarsch-Rose neural networks on synchronisation and on the rate of information

2009-10-06

arxiv.org/abs/0910.0988v3

Phys. Rev. E, vol. 82, 036203 (2010)

Nonlinear Sciences

Chaotic Dynamics

Scientific paper

In this work we studied the combined action of chemical and electrical synapses in small networks of Hindmarsh-Rose (HR) neurons on the synchronous behaviour and on the rate of information produced (per time unit) by the networks. We show that if the chemical synapse is excitatory, the larger the chemical synapse strength used the smaller the electrical synapse strength needed to achieve complete synchronisation, and for moderate synaptic strengths one should expect to find desynchronous behaviour. Otherwise, if the chemical synapse is inhibitory, the larger the chemical synapse strength used the larger the electrical synapse strength needed to achieve complete synchronisation, and for moderate synaptic strengths one should expect to find synchronous behaviours. Finally, we show how to calculate semi-analytically an upper bound for the rate of information produced per time unit (Kolmogorov-Sinai entropy) in larger networks. As an application, we show that this upper bound is linearly proportional to the number of neurons in a network whose neurons are highly connected.

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