Computer-generated 3-D reconstruction from case D48, after injection of BDA and FR into SI whisker barrels located in different rows (A). The clusters of labeling are confined within a single lamellar pontine subspace (B: ventral view), and red dots are located predominantly more dorsally than black dots (C: slices 50 - 80, D: slices 60 - 80). In a transverse slice (C: slice 50) the rounded clusters may seem to be shifted inside - out, however, in sagittal slices (D: slice 60 - 70) it is shown that these rostral clusters are located within a curved elongated volume. This case is documented in Leergaard et al., 2000b).