learning memory nonhuman 62 Memory 56 article 53 controlled study 51 Animals 46 priority journal 42 animal experiment 35 male 35 Humans 31 Male 31 human 29 physiology 27 animal 26 memory consolidation 25 Learning 23 crab 22 hippocampus 21 Time Factors 19 Female 17 Hippocampus 17 long term memory 17 nerve cell plasticity 17 Behavior, Animal 15 adult 15 female 15 Review 14 memory disorder 14 Rats 13