Spike rate differences between high- and low-convexity regions around the objects for both corner and non-corner cells. Convex corner cells were identified in the convex-1 environment (two-tailed Wilcoxon signed-rank test against zero: corner cells, P = 0.016; non-corner cells, P = 0.58; two-tailed Wilcoxon signed-rank test: corner cells versus non-corner cells, P = 0.016; n = 7 mice).