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Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences
Article . 2009 . Peer-reviewed
License: Royal Society Data Sharing and Accessibility
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zbMATH Open
Article . 2009
Data sources: zbMATH Open
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Delays in activity-based neural networks

Authors: Coombes, Stephen; Laing, Carlo;

Delays in activity-based neural networks

Abstract

In this paper, we study the effect of two distinct discrete delays on the dynamics of a Wilson–Cowan neural network. This activity-based model describes the dynamics of synaptically interacting excitatory and inhibitory neuronal populations. We discuss the interpretation of the delays in the language of neurobiology and show how they can contribute to the generation of network rhythms. First, we focus on the use of linear stability theory to show how to destabilize a fixed point, leading to the onset of oscillatory behaviour. Next, we show for the choice of a Heaviside nonlinearity for the firing rate that such emergent oscillations can be either synchronous or anti-synchronous, depending on whether inhibition or excitation dominates the network architecture. To probe the behaviour of smooth (sigmoidal) nonlinear firing rates, we use a mixture of numerical bifurcation analysis and direct simulations, and uncover parameter windows that support chaotic behaviour. Finally, we comment on the role of delays in the generation of bursting oscillations, and discuss natural extensions of the work in this paper.

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Keywords

Neurons, chaos, multiple delays, Models, Neurological, Synaptic Potentials, Neural networks for/in biological studies, artificial life and related topics, Wilson-Cowan networks, multiple-delays, phase-locking, chaos, Neural biology, Oscillometry, Wilson-Cowan networks, Synapses, Reaction Time, Animals, Humans, Nerve Net, phase locking

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
71
Top 10%
Top 10%
Top 10%
Green
hybrid