CACNA1A and spinocerebellar ataxia type 6: Analysis of the median voxel values across anterior and posterior cerebellar lobes identified significantly lower MD in SCA6 (p = 3.29e-07) and Dystonia (p = 1.04e-08) cohorts (Table 2C, Fig. 3A), while significantly higher fs values were observed in the same two movement disorder groups, Dystonia and SCA6 (p = 3.94e-08 and p = 1.27e-05 respectively).