Table 2.
White-matter tracts showing abnormal FA, MD, AD, and RD in Parkinson’s disease.
| Tract | FA | MD | AD | RD |
|---|---|---|---|---|
| Corpus callosum | B | B | – | B |
| Cingulum | B | B | – | B |
| Anterior corona radiata | L | B | – | B |
| Superior corona radiata | B | – | – | B |
| Anterior thalamic radiation | L1 | B | R | B1 |
| Forceps minor | B | B | R | B |
| Forceps major | R | B | – | B |
| Inferior fronto-occipital fasciculus | B2 | B3 | R | B2 |
| Superior longitudinal fasciculus | B | B | – | B |
| Inferior longitudinal fasciculus | R | R | – | B |
| Total voxels | 6068 | 19431 | 818 | 19125 |
Fractional anisotropy (FA) was reduced and mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) were increased in the Parkinson’s group. B, bilateral hemispheres; L, left hemisphere; R, right hemisphere.
1The tract includes the left internal capsule.
2The tract includes the left external capsule.
3The tract includes the right external capsule.