Fig. 2.
Dot displays for a network of continuous-time discrete-PSP neurons. One second of activity of 20 randomly selected neurons from the input stream (layer 1) and several layers along the network. Each layer consisted of 6000 neurons; the percentage of shared inputs between two neurons at a given layer was 10%. Each neuron received 300 excitatory and 300 inhibitory inputs. The same connection matrix was used for all the layers. Spike trains in the input layer (layer 1) are random and uncorrelated, with an average rate of 50 spikes/sec. Threshold was set to 11, at which the decline in firing rate in deeper layers was very gradual. Buildup of synchrony is obvious.