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Cooperative coding of continuous variables in networks with sparsity constraint

Fig 10

Response times of cooperatively coding spiking neural networks.

(A) Network wiring diagram of the balanced excitatory-inhibitory spiking network. Connections are marked in black if their strength depends on RF size, and in gray otherwise. (B) Stationary rate profiles of excitatory (blue) and balanced networks (red) in response to isolated inputs match. There is no balanced network simulation shown for , since there is no recurrent coupling between or within populations in that case. (C) Top: Response times. Blue: purely excitatory network (cf. Fig 8). Red: balanced excitatory-inhibitory network. Dashed horizontal line: membrane time constant. Quadratic and linear scaling is indicated by the dashed and dotted lines, respectively. Bottom: scaling factor s used to scale up the excitatory synaptic coupling strength in the balanced network. (D) Activity of a balanced network with RF size 11. Panels as in Fig 8D, 8E; top: excitatory, bottom: inhibitory populations. (E) Direct comparison of the rate of the stimulated population (index 21) around stimulus onset in the purely excitatory network (blue, cf. black trace in Fig 8E), and in the balanced network (red, cf. black trace in panel D, top). Rates are shown for a finer binsize of 0.5 ms.

doi: https://doi.org/10.1371/journal.pcbi.1012156.g010