Rats Rats, Wistar controlled study male rat 76 nonhuman 74 Animals 72 Male 72 article 72 animal experiment 68 priority journal 54 animal tissue 42 Time Factors 30 animal model 27 Wistar rat 18 animal 18 female 18 Hippocampus 17 enzyme activity 17 hippocampus 17 protein expression 17 animal cell 16 unclassified drug 16 long term memory 15 Female 14 Exploratory Behavior 13 learning 13 Avoidance Learning 12 Rattus 12 metabolism 12