Overlap of significant (whole-brain corrected PFWE<0.05) genotype-independent negative correlations between MD and mean positive arousal ratings (in blue color) and significant (whole-brain corrected PFWE<0.05) genotype-dependent MD differences (in red color) exemplarily in the forceps major and inferior fronto-occipital fasciculus (green circle). For a brain-wide overview see Supplementary Figure S1 in the supplementary. MD, mean diffusivity.