Emergence of Slow-Switching Assemblies in Structured Neuronal Networks
Fig 10
SSA activity in hierarchical LIF networks.
A Schematic of a hierarchically clustered LIF network. Each excitatory group consists of two subgroups. B A hierarchical modular LIF network with N = 2000 neurons and the resulting raster plot of its simulation. SSA activity is observed at two time scales, corresponding to the two hierarchical levels embedded in the network structure: slow switching between the large groups and faster switching between the inner subgroups (see inset). C The spectrum of the weight matrix of this hierarchical network exhibits two eigenvalue gaps corresponding to the two slow time-scales the network can support.