Modular organization enhances the robustness of attractor network dynamics

Details Modular organization enhances the robustness of attractor network dynamics Modular organization enhances the robustness of attractor network dynamics

2011-01-31

arxiv.org/abs/1101.5853v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

6 pages, 4 figures

Scientific paper

Modular organization characterizes many complex networks occurring in nature, including the brain. In this paper we show that modular structure may be responsible for increasing the robustness of certain dynamical states of such systems. In a neural network model with threshold-activated binary elements, we observe that the basins of attractors, corresponding to patterns that have been embedded using a learning rule, occupy maximum volume in phase space at an optimal modularity. Simultaneously, the convergence time to these attractors decreases as a result of cooperative dynamics between the modules. The role of modularity in increasing global stability of certain desirable attractors of a system may provide a clue to its evolution and ubiquity in natural systems.

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