Ubiquity of collective irregular dynamics in balanced networks of spiking 
neurons

Ullner, Ekkehard; Politi, Antonio; Torcini, Alessandro

doi:10.1063/1.5049902

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Ubiquity of collective irregular dynamics in balanced networks of spiking neurons

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Politi, Antonio
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Torcini, Alessandro
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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https://aip.scitation.org/doi/abs/10.1063/1.5049902
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Ullner, E., Politi, A., & Torcini, A. (2018). Ubiquity of collective irregular dynamics in balanced networks of spiking neurons. Chaos, 28(8): 081106. doi:10.1063/1.5049902.

Cite as: https://hdl.handle.net/21.11116/0000-0002-61E4-F

Abstract

We revisit the dynamics of a prototypical model of balanced activity in networks of spiking neurons. A detailed investigation of the thermodynamic limit for fixed density of connections (massive coupling) shows that, when inhibition prevails, the asymptotic regime is not asynchronous but rather characterized by a self-sustained irregular, macroscopic (collective) dynamics. So long as the connectivity is massive, this regime is found in many different setups: leaky as well as quadratic integrate-and-fire neurons; large and small coupling strength; and weak and strong external currents. Published by AIP Publishing.