Extended Data Fig. 9: Tetrode tracks from all animals in which recordings were obtained for this study.

Targeting of CA2 and CA1 in the animals included in this study. Some of our 8 tetrodes targeted to CA2 may have picked up a few cells from neighboring CA1 and CA3 regions, which would only cause us to underestimate any true differences between CA2 and CA1 spatial and social properties.