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Neurobiologically Realistic Determinants of Self-Organized Criticality in Networks of Spiking Neurons

Figure 8

Role of modularity and low wiring cost in emergence of self-organized critical network dynamics.

(a) An illustrative lattice connectivity matrix with the optimal power-law () density scaling function. Presumed network modules are shown in yellow, while inhibitory synapses are shown in red. Note the presence of significant numbers of intermodule inhibitory synapses. (b) A variant of the connectivity matrix in (a), with modularity of inhibitory neurons. (c) Statistical significance of power-law distributions of avalanche sizes (black) and durations (red) for the lattice (top), the lattice with restored module spike rate (center), and the modified lattice, in which inhibitory neurons were arranged into explicit modules. Gray lines show the threshold for power-law scaling. Error bars represent the standard error of the mean from simulations.

doi: https://doi.org/10.1371/journal.pcbi.1002038.g008