animal experiment learning nonhuman 94 controlled study 86 article 74 male 66 Animals 64 priority journal 62 Male 56 Memory 46 Learning 40 crab 40 memory 36 conditioning 32 long term memory 32 Brachyura 28 Behavior, Animal 26 rat 26 training 26 memory consolidation 24 hippocampus 22 Hippocampus 20 Rats 20 animal 20 Article 18 Time Factors 18 animal behavior 18 habituation 18 physiology 18 Conditioning, Classical 16