Computer-generated 3-D reconstruction from case D45, after injection of BDA and FR into SI whisker barrels located within the same row (A). This case demonstrates both the inside-out relationship and co-localization of paired labeled clusters. The clusters of red dots surround the clusters of black dots externally, i.e., laterally (B: ventral view, C: slices 40 - 90), dorsally (C: slice 70, D: slices 40 - 70), and medially (B: ventral view, C: slices 50 - 60, D: slices 10 - 20). The black dots curve around an unlabeled region in the central core of the pontine nuclei. The medially located red and black clusters are mirrored in the contralateral pontine nuclei (B: ventral and rostral views).