Figure 2.

Firing bunches stem from neuronal response failures—in-vitro experiments. (A) Schematic of the neuron in Figure 1 characterized by f_c = 5 Hz, with 600 and 630 ms self-feedback loops. (B) A 3.5 s snapshot of the experimental results of (A) where stimulations (blue lines) and their corresponding evoked spikes (blue dashed lines) were recorded after an offset of t_o = 21 s and a preparation at 5 Hz stimulation frequency over 300 s to settle the neuron at the intermittent phase. (C) Schematic of a circuit consisting of three different neurons with f_c = 6.8 (green), 7.2 (brown), and 4.0 (purple) Hz and 600 and 630 ms delay loops, similar to (A), [different neurons than the one in (A)]. (D) A 5 s snapshot of the experimental results of (C) where 10 initial stimulations were given to the central neuron (brown) at 4 Hz and t_o = 25 s. Stimulations given to the colored neurons (brown/green/purple lines, respectively) and their corresponding evoked spikes (brown/green/purple dashed lines, respectively). A zoom-in of the gray area is presented (bottom).