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Avalanches in a Stochastic Model of Spiking Neurons

Figure 2

Network connectivity and dynamics.

A, schematic of connection strengths between excitatory, , and inhibitory, , populations, where an arrow indicates a synaptic input. B, schematic of functionally feedforward connectivity, where one mode of network excitation, , excites another mode , but does not directly affect . C, network dynamics visualized. If there are excitatory and inhibitory neurons active, another excitatory neuron may become active, and network state moves rightwards one spot, at net rate , where is the total synaptic input to an excitatory neuron. The rates for other transitions are shown with solid arrows and discussed in the population dynamics section of the results. Dashed arrows represent transitions into the state from adjacent states.

doi: https://doi.org/10.1371/journal.pcbi.1000846.g002