Berlin 2018 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 58: Chimera states: symmetry-breaking in dynamical networks (joint session DY/SOE)
DY 58.8: Talk
Thursday, March 15, 2018, 12:00–12:15, BH-N 128
Chimera State in Neuron Populations with Dynamical Synapses — Ali Calim1, Philipp Hövel2, Mahmut Özer3, and •Muhammet Uzuntarla1 — 1Department of Biomedical Engineering, Bulent Ecevit University, 67100 Zonguldak, TURKEY — 2Institut für Theoretische Physik, Technische Universitat Berlin, Hardenbergstraße 36, 10623 Berlin, Germany — 3Department of Electrical-Electronics Engineering, Bulent Ecevit University, 67100 Zonguldak, TURKEY
Current literature on Chimera state in neuronal populations mostly discusses the topic with dynamical system arguments which does not provide information about potential concrete biological reasons giving rise to emergence of Chimera in neural medium. With this motivation, our aim is to investigate the influence of short-term synaptic plasticity (STP) on Chimera state in a non-locally coupled network of spiking Morris-Lecar neurons. We first show that Chimera state can appear in population with static synapses (non-plastic) in case of either weak synaptic strength or sparse connectivity between neurons. When there exists strong synaptic strength and dense connectivity, the whole population exhibits synchronized behavior. But, we found that optimal levels of synaptic depression and facilitation at chemical synapses can induce Chimera and Multi Chimera states in such strongly and densely coupled neural populations. Notably, to the best our knowledge, we here show for the first time the existence of Chimera state with Morris-Lecar model neurons.