Extended Data Figure 9. Control experiments for aged mice.

a, Design for experiment of recall for single contextual experience. b, There was no difference in reactivation of cells between young and old mice during recall (unpaired t-test, t₆ = 0.59, n.s., n=4,4). c, Design for experiment with single context pre-exposure in young and old mice. d, There was no difference in freezing behavior to exposures of a single context (unpaired t-test, t₂₉ = 0.24, n.s., n=16,15). e, Design for replication of TetTag experiment in old mice. f, There was no difference in the levels of overlapping ensembles between the 5h and 7d groups (unpaired t-test, t₆ = 0.06, n.s., n=3,5). Results show mean +/− sem.