Figure 4

Shown in Figure 3 A through H, cortical activation following nerve trunk stimulation in the ADNI and SDNI groups ( P = 0.005). Obvious expansion can be seen in the ulnar nerve cortical representation in Figure 4 A and C. The right radial nerve also became overactivated in comparison to the healthy state, although this was not as prominent as the median and ulnar nerve bundle on the healthy side. The expansion not only became diffuse, but also entered the other hemisphere and occupied the motor area that previously represented the right median and ulnar nerve bundle. Figure 4I shows the statistical analysis of voxel-counting across slices. A significant change in voxel number between the acute and subacute stages was found in the representations of the left median and ulnar nerve bundles and the right radial nerve (★ P < 0.05; ★★ P < 0.01).