White matter maps showing regions of significant decreased fractional anisotropy and increased mean diffusivity in MSA patients when compared to healthy controls and PD (Bonferroni corrected alpha = 0.0167).

Background image corresponds to the mean fractional anisotropy image of all subjects in standard MNI152 space (radiological view). Fractional anisotropy white matter skeleton is represented by green voxels. Blue voxels represent regions of decreased FA and yellow voxels represent regions of increased MD in the PSP group.