Fig. 3.

Relation between constant firing rate of neural activity representing the non-preferred and preferred stimulus and firing rate at the output of one interneuron for “non-preferred stimulus only” (solid line), “preferred stimulus only” (dashed line) and for “both stimuli” (dashed-dotted line). For the condition “non-preferred stimulus only” (solid line), the input to the interneuron has two components. One component represents the non-preferred stimulus by 80 Poisson spike series, each with a constant firing rate f _in. The other component represents the activity of 3 spikes/s in the population encoding the absence of the preferred stimulus. The dashed line shows the output of the interneuron for the preferred stimulus only. The dashed-dotted line shows the output of the interneuron to both stimuli, each represented by 80 Poisson spike series with a constant firing rate f _in. The inset shows the population activity of GWN-modulated Poison spike series, according to Eq. (1) with A _m = 6