Fig. 6.

Sensitivity analysis of the model solution based on the simulated movement of the particles. Autocorrelation functions obtained for isotropic (A; see Fig. 3) and anisotropic cases (B; see Fig. 5) were compared with the model solution. The model solution was obtained for different diffusion coefficient combinations, and the goodness of fit was assessed using the sum of residuals (see materials and methods, Eq. 5). Note that for the isotropic case, the best fit (blue area) is in the region where both the diffusion coefficients are close to each other. For the anisotropic case, the region with the best fit shifts significantly, indicating the difference in diffusion coefficients.