Figure 5. Additional examples of putative boundary cells and an ambiguous cell.

These cells had spatial information scores in the large box < 0.05, so they were not included in Figure 4. However, these cells were among the top 8 in terms of their correlation coefficients between the small box and the rescaled large box. Cells 32 and 33 fired along a wall in both boxes. Cell 34, recorded from a ventral location (Table 1), might have shown a simple grid vertex that either scaled with the environment or just revealed more of the vertex when the small box walls were removed.