Figure 8. ERK5 icKO mice are impaired in the acquisition of a sand digging-based,

odor-cued associative learning. A) Control, but not ERK5 icKO mice learned to associate a food reward with pregnant female mouse over a 5-day training course. B) ERK5 icKO mice did not learn as well as control mice to associate a food reward with ovariectomized female mouse urine over a 6-day training course. n ≥7 mice per treatment group.