Cerebral Cortex brain cortex 74 article 66 Male 52 nonhuman 50 Rats 46 rat 46 controlled study 44 priority journal 44 Humans 42 Animal 40 Animals 38 Female 38 animal experiment 36 human 36 male 36 central nervous system 30 female 30 Support, Non-U.S. Gov't 28 adult 24 animal 24 animal cell 24 Adult 22 Rats, Inbred Strains 20 animal tissue 18 drug receptor binding 18 physiology 18 radioisotope 18 nerve cell 16 Cerebral cortex 14