Supplementary Figure 7: Grid cell patterns are stable across consecutive trials in AB.

(a) Example rate maps for one grid cell recorded across 5 consecutive trials in AB after the wall was removed for the third time (trial numbers are indicated on the top, trial numbers AB1 to AB5 correspond to the 8^th to the 12^th exposure in the merged box). Peak firing rates are indicated at the bottom right. Rat identity and cell number is indicated at the top (T = tetrode, C = cell). Scale bar, 50cm. (b) Average correlation between pairs of 5 consecutive trials in AB for 9 simultaneously recorded grid cells including the cell in a, color-coded from dark blue to dark red (color bar). Grid cells shared the same spacing and orientation. Note, all pairwise correlation values between trials were high, suggesting that in each cell, grid field locations showed little change between consecutive trials in AB.