highly significantp < 0.006
Highly significant effects of the environment showed that exploration triggered a marked increase in IEG expression in the hippocampus (F 1,23 = 9.099; p < 0.006) and OFC (F 1,23 = 9.598; p < 0.005) of exploring rats (A 1 A 2 ) compared to rats remaining in their home cages (HC).