Supplementary Material 3.

Renderings displaying the spatial distributions of sub-cortical connectivity from the ipsilateral sub-segmented STN. Regions were identified as areas where the corresponding tractography overlapped in 3 or more subjects at a tractography threshold of 1%. The individual voxel values of the groups were defined according to the STN sub-region they were maximally assigned to across all subjects. Colour coded according to the calculated STN regions shown previously (red = anterior “Limbic” STN, green = middle “associative” STN, blue = posterior “motor” STN). Outline of the region of interest shown in transparent grey. Substantia nigra and red nucleus not shown as these areas were strongly connected to all regions.