Figure 3.
Results of the emulations on the FACETS Stage 1 Hardware. External stimulation of diverse strength is controlled via Vrest and Winput. For every tile, 20 randomly connected networks with new external stimulation were generated. The resulting average firing rates are illustrated by different shades of gray. Inevitably, differing saturation ranges had to be used for the panels. HORIZONTAL: different types of recurrent synapses. (A,D) Solely input driven networks without recurrent connections. (B,E) Recurrent networks with dynamic synapses using short-term plasticity. (C,F) Recurrent networks with static synapses. VERTICAL: Mean activity of the entire network (A–C) and the balance of the populations, measured by the difference between the mean excitatory and inhibitory firing rates (D–F).