Extended Data Fig. 9: ABA experiment.

a, Schematic of ABA experiment. After the 1^st recording session in an asymmetric chamber with landmarks, the fish was removed and transferred into a chamber with a distinct arrangement of geometric features and landmarks for the 2^nd recording session. For the 3^rd recording session, the fish was removed and transferred back to the chamber that was used in the 1^st recording session (Methods). b, Example animal trajectories in each session. c, Change in the distribution of telencephalic PCs with confined PFs, similar to Fig. 4b. Here, the distributions are plotted separately for 1^st session (top), 2^nd session (middle), and 3^rd session (bottom) for an example animal. Red boxes indicate the session where telencephalic PCs were defined in each column. d, Example spatial activity maps as Fig. 4c. e, Summary of the changes in telencephalic PCs across the 1^st and 2^nd session, the 2^nd and 3^rd session, and the 1^st and 3^rd session. Similar to Fig. 4d, PF cor., PV cor., and PF shift were calculated for 4 fish. Each distribution uses the union of telencephalic PCs from the two sessions being compared. Grey shaded regions show the distribution of each measurement, and black horizontal bars indicate medians. Each column is one fish. The results of statistical tests are marked on top of the distributions being compared (one-sided Mann–Whitney U test, *** for p < 10⁻⁵, ** for p < 0.001, * for p < 0.01, n.s. for p ≥ 0.01, n.a. for not enough samples). The range of sample sizes are provided on the right of each metric. See Supplementary Table 1 for exact p-values and exact sample sizes.