White matter tract regions exhibiting significant (clusterwise P < 0.001) differences in FA in patient subgroups compared to normal controls. (A) Regions of reduced FA in patients with poorer motor skill. (B) Regions of elevated FA in patients with better motor skill. Shown are clusters in: 1, lesion zone involving precentral gyrus, superior/anterior corona radiata, genu of internal capsule and anterior limb of internal capsule; 2, remote from lesion in contralesional posterior limb of internal capsule, cerebral peduncle; 3, remote from lesion in ipsilesional posterior limb of internal capsule, cerebral peduncle, genu of internal capsule and anterior limb of internal capsule; 4, remote from lesion in ipsilesional superior/anterior corona radiata; 5, remote from lesion in contralesional PLIC; 6, remote from lesion in ipsilesional posterior limb of internal capsule; 7, remote from lesion in ipsilesional superior corona radiata. Clusters shown overlaying mean FA image from all subjects.