Pattern separation of CA1 place representation. Distribution of correlation coefficients (left) and place field shift (right) between the two place fields (“ORIGinal cue” vs. “ROTated cue”) in control and mutant mice. Each recording time was 15 min. Values indicate mean ± S.E.M. Significance was evaluated using the Wilcoxon rank sum test. Values indicate the mean ± S.E.M.