CMs of forepaw (FP, yellow), hindpaw (HP, green), whisker pad (Barrel, purple) and nose (Nose, red) S1 areas are shown at different t thresholds. The displacement from the CM determined at a given t-threshold to the mean CM is shown as a function of t-threshold (A, B, D, and E). Four CMs at both hemispheres are shown in 3D space with a transparent ellipsoid superimposed on each center, of which the three radii demonstrated the variability of the CM coordinates in x, y, and z axes (C).