Computer-generated 3-D reconstruction from case D53, after injection of BDA and FR into SI whisker barrels located within the same row (A). The clusters of labeling are similar of shape and demonstrate an inside-out relationship, with the red dots surrounding the black dots externally, i.e. laterally (B: ventral view, C: slices 50 - 80), dorsally (C: slice 80), rostrally (B: ventral and sagittal views, D: slices 60 - 70), caudally (B: ventral and sagittal views, D: slices 60 - 80), and medially (B: ventral and rostral views, C: slices 40 - 70).