Abstract
In complex systems like neural circuits, transient dynamics can stay of a large interest, being a promising explanation of the observed biological phenomena. In particular, spike-wave discharges (SWDs, the main encephalographic manifestation of absence seizures) were recently considered as possible long transient processes, since signal analysis showed no special mechanism of their termination while a number of initiation mechanisms were described in the literature. Here, we construct the ensemble of eight mesoscale models (electronic circuits) different by connectivity matrix and show that they indeed demonstrate long quasiregular transient dynamics in a reasonable area of parameters. All models from the ensemble were networks consisting of 14 electronic FitzHugh–Nagumo neuron oscillators connected based on anatomical laws for thalamocortical system. Most of networks were able to demonstrate epiletiform-like activity of reasonable duration in response to short in time external driving which is one of known mechanisms for absence epilepsy. The distribution of model SWDs by length was comparable with what is known for animal models. The proposed models are of fundamental interest being first known electronic model of absence seizures. They can be also used for testing and validating approaches for directed connectivity analysis which are very essential in brain study.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
We devote this study to the memory of professor Evgeny P. Seleznev, who left this world in September 2021. He was outstanding experimenter and has supported and inspired us for many years.
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This work was supported by Russian Science Foundation, Grant No. 19-72-10030.
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Egorov, N.M., Kulminskiy, D.D., Sysoev, I.V. et al. Transient dynamics in electronic neuron-like circuits in application to modeling epileptic seizures. Nonlinear Dyn 108, 4231–4242 (2022). https://doi.org/10.1007/s11071-022-07379-6
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DOI: https://doi.org/10.1007/s11071-022-07379-6