Fig 2. Excitation patterns and dynamics in a 1D array of coupled FHN units without DGF.

The pacing period T = 45 and system size L = 128. a. An example of Con-P2 patterns and the corresponding global signal $\overline{c}\left(t\right)$. b. An example of Dis-P2 patterns with a different initial condition from panel a, and the corresponding $\overline{c}\left(t\right)$. c. Percentage of Dis-P2 patterns versus the standard deviation (σ_ini of the random initial conditions. ${\sigma }_{ini}=\delta /\sqrt{3}$. We performed 100 trials for each σ_ini value in the plot. d. Histogram of domain size l (segment between two neighboring nodes, as indicated in panel b) from 2000 trials of random initial conditions with δ = 0.15. For each trial, 2000 beats were applied for the system to reach a steady state. The domain size was measured using the last two beats. e. Histogram of global P2 amplitude $\mathrm{\Delta }{\overline{c}}_{peak}$, (difference between the peak values of two consecutive beats, as indicated in panel a) for the simulations in d. $\mathrm{\Delta }{\overline{c}}_{peak}$ was measured using the last two beats.