Computer-generated 3-D reconstruction from case D52, after injection of BDA and FR into SI whisker barrels located in different rows (A). In this case the BDA injection involved barrels with higher numbers (C4,5) than the FR injection (E1, 2). The clusters are located in separate lamellae, shifted inside-out (B: ventral and sagittal views), while black dots tend to be located more dorsally than red dots (C: slices 70 - 80). Thus, this case displays topographical shifts characteristic for both 'within rows' cases (inside-out) and 'across rows' cases (dorsal to ventral).