Figure 4.

Journey-dependent activity during the SW task. A, B, The proportion of cells with journey-dependent activity declined during SW1 compared with STD1 in both CA1 (A) and CA3 (B), although the decline was statistically significant only in CA1 (marked by an asterisk above the dotted line). Journey-dependent activity was separated into prospective and retrospective categories. The ratio of cells with journey-independent activity located on the start arms is depicted within the journey-independent area (S%). The number of total active cells included in each dataset is indicated below each pie. The decline in journey-dependent activity was also shown by increased spatial correlations of mean firing rates calculated for the whole maze arm across journeys (C, D). The boxes show the interquartile range and the bold lines indicate the mean. The average spatial correlations of all active cells increased significantly during the SW1, but not the SW2 sessions. Similarly, the correlations (r) between journeys (J1 and J2) were significantly greater during SW1 than STD1 when the mean firing rates was calculated for each maze arms (collapsing grid units) in both CA1 (E) and CA3 (F).