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Top: Histograms of interspike interval (ISI), denoted as s, normalized by the average period, for three parameter configurations. Bottom: Histograms of the coefficient of variation CV, as defined by Equation (14). Parameters (Equation 7) and state (as defined in Figure 2), for both Top and Bottom: (A) K = 3.0, ΔK/K = 0.6, state: D. (B) K = 3.0, ΔK/K = 0.1, state: D+S. (C) K = 12.0, ΔK/K = 0.1, state: S.
