Figure 8

(a) Electric circuit of five interconnected units used to demonstrate chaotic oscillations. Two inhibitory units (N1, N2) are interconnected with three excitatory units (N3, N4, N5). DCinput,i pulse sources are connected to units N2, N3 and N5 through Rinput,i resistors. (b) Schematic representation of the electric circuit with inputs, outputs, excitatory units and connections (white), inhibitory units and connections (black), and inter-unit path resistances.