Figure 6.

A randomly connected network with depressing synapses produces distinct responses to multiple stimulus features. (A) Confusability matrix between the network's activity states following 1–8 transient stimuli of one of six durations from 0.05 s to 0.30 s (48 stimulus combinations in total). 15 combinations are perfectly distinct. (B) Confusability matrix between the network's activity states following 1–8 transient stimuli of one of seven amplitudes from 0.5 to 2.0 (56 stimulus combinations in total). 17 combinations are perfectly distinct. (C) Confusability matrix between the network's activity states following a single transient stimulus of one of eight durations from 0.05 s to 0.4 s and one of five amplitudes from 1.0 to 2.0 (32 stimulus combinations in total). Although no individual combination is perfectly distinguished from all others, 18 distinct states are apparent, with the majority of states responding to a single amplitude and two durations. (D) Confusability matrix between the network's activity states following 1–6 transient stimuli of one of three durations (0.1 s, 0.2 s, 0.3 s) and one of three amplitudes (1.0, 1.5, 2.0). 23 stimulus combinations are perfectly distinguished and over 25 distinct activity states are produced.