Figure 2. Mean firing rate similarity shows peak at same time epoch in the following presentation of current stimulus.

(a) Mean similarity profiles for connectivity network simulation versus time lag . Firing rate similarities calculated using 100 msec window incremented in 10 msec steps. Epochs after stimulus onset shown in key. Bars indicate sem. Vertical lines indicate averaging periods (see Figure 2(b)). 500 cell network simulation of length 180–12 seconds under a second input switching protocol. Inhibitory neurotransmitter timescale msec. Synaptic strength so that peak synaptic conductance is and peak IPSP size (b) Illustration of mean similarity profiles and calculation of averages , , . For example the green solid line shows while is the mean similarity in the intersection of the green solid line and the two diagonal lines denoted by at time lags .