(A)–(F) The distributions of phase-lock intervals (PLI) from simulated fMRI time series (corresponding to the Kuramoto model shown in Fig. 1) for coupling strengths ranging from k 3–8. Dashed black lines indicate a power-law with exponent α=5.9, 4.7, 3.8, 3.2, 3.3, and 2.7 for (A)–(F), respectively, to guide the eye. (G) and (H) Goodness-of-fit of power-law distributions based on Kolmogorov–Smirnov (KS) statistics for scale 1 (0.25–0.13 Hz) and scale 2 (0.13–0.06 Hz). A KS value closer to 0 indicates better power-law fit.