We study patterns of partial synchronization in a network of FitzHugh–Nagumo oscillators with empirical structural connectivity measured in human subjects. We report the spontaneous occurrence of synchronization phenomena that closely resemble the ones seen during epileptic seizures in humans. In order to obtain deeper insights into the interplay between dynamics and network topology, we perform long-term simulations of oscillatory dynamics on different paradigmatic network structures: random networks, regular nonlocally coupled ring networks, ring networks with fractal connectivities, and small-world networks with various rewiring probability. Among these networks, a small-world network with intermediate rewiring probability best mimics the findings achieved with the simulations using the empirical structural connectivity. For the other network topologies, either no spontaneously occurring epileptic-seizure-related synchronization phenomena can be observed in the simulated dynamics, or the overall degree of synchronization remains high throughout the simulation. This indicates that a topology with some balance between regularity and randomness favors the self-initiation and self-termination of episodes of seizure-like strong synchronization.
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December 2020
Research Article|
December 14 2020
FitzHugh–Nagumo oscillators on complex networks mimic epileptic-seizure-related synchronization phenomena
Moritz Gerster
;
Moritz Gerster
1
Institut für Theoretische Physik, Technische Universität Berlin
, Hardenbergstr. 36, 10623 Berlin, Germany
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Rico Berner
;
Rico Berner
1
Institut für Theoretische Physik, Technische Universität Berlin
, Hardenbergstr. 36, 10623 Berlin, Germany
2
Institut für Mathematik, Technische Universität Berlin
, Strasse des 17. Juni 136, 10623 Berlin, Germany
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Jakub Sawicki
;
Jakub Sawicki
1
Institut für Theoretische Physik, Technische Universität Berlin
, Hardenbergstr. 36, 10623 Berlin, Germany
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Anna Zakharova
;
Anna Zakharova
1
Institut für Theoretische Physik, Technische Universität Berlin
, Hardenbergstr. 36, 10623 Berlin, Germany
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Antonín Škoch
;
Antonín Škoch
3
National Institute of Mental Health
, Topolová 748, 250 67 Klecany, Czech Republic
4
MR Unit, Department of Diagnostic and Interventional Radiology, Institute for Clinical and Experimental Medicine
, Prague, Czech Republic
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Jaroslav Hlinka
;
Jaroslav Hlinka
3
National Institute of Mental Health
, Topolová 748, 250 67 Klecany, Czech Republic
5
Institute of Computer Science of the Czech Academy of Sciences
, Pod Vodarenskou vezi 2, 18207 Prague 8, Czech Republic
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Klaus Lehnertz
;
Klaus Lehnertz
6
Department of Epileptology, University of Bonn Medical Centre
, Venusberg Campus 1, 53127 Bonn, Germany
7
Helmholtz Institute for Radiation and Nuclear Physics, University of Bonn
, Nussallee 14–16, 53115 Bonn, Germany
8
Interdisciplinary Center for Complex Systems, University of Bonn
, Brühler Straße 7, 53175 Bonn, Germany
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Eckehard Schöll
Eckehard Schöll
a)
1
Institut für Theoretische Physik, Technische Universität Berlin
, Hardenbergstr. 36, 10623 Berlin, Germany
9
Bernstein Center for Computational Neuroscience Berlin
, Humboldt-Universität, 10115 Berlin, Germany
a)Author to whom correspondence should be addressed: schoell@physik.tu-berlin.de
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a)Author to whom correspondence should be addressed: schoell@physik.tu-berlin.de
Chaos 30, 123130 (2020)
Article history
Received:
July 10 2020
Accepted:
November 23 2020
Connected Content
A companion article has been published:
Small-world network structure mimics spontaneous synchronization in epileptic seizures
Citation
Moritz Gerster, Rico Berner, Jakub Sawicki, Anna Zakharova, Antonín Škoch, Jaroslav Hlinka, Klaus Lehnertz, Eckehard Schöll; FitzHugh–Nagumo oscillators on complex networks mimic epileptic-seizure-related synchronization phenomena. Chaos 1 December 2020; 30 (12): 123130. https://doi.org/10.1063/5.0021420
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