Fig. 7

The Somatotopic Organization of Matrix-favoring Projections. Structural connectivity with the human striatum (outlined with light-blue dashes) is organized somatotopically. The five matrix-favoring bait regions utilized here project to all parts of the human striatum (caudate and putamen, indicated by C and P), but at particular zones (colored voxels), matrix-like connectivity is primarily driven by one bait region. Though the left and right hemispheres were parcellated independently, the location of their somatotopic zones was highly similar, as seen in axial (A), coronal (B), and left sagittal (C) planes. No cluster-forming algorithms were utilized. The five striosome-favoring bait regions also have distinct zones of influence, but only the matrix-favoring zones are shown here for clarity. While a somatotopic zone may abut zones specific for other matrix-favoring regions, there was no overlap in somatotopic zones. Somatotopic maps are overlaid on the MNI152_T1_1mm standard brain. Image follows radiographic convention. Coordinates follow MNI convention