Fig. S3.

Additional plots of simulated diffusion of excitation. (A) Diffusivity D plotted against time for the five types of regions in the membrane (Eq. 1). (B) Plots of the fits of the equation ${\sigma }^2\left(t\right)-{\sigma }^2\left(0\right)=A{t}^{\alpha }$, in which A and α were fit parameters, to diffusion dynamics in each of the five membrane regions.