human 109 Humans 75 male 60 Article 54 Research & information: general 48 adult 48 article 48 controlled study 48 female 48 physiology 43 Action research 39 Animals 38 animal 38 action potential 35 Biology, life sciences 33 Action Potentials 29 Male 29 Pressure groups, protest movements and non-violent action 27 Psychology 27 Technology: general issues 27 nonhuman 24 Education 23 human experiment 23 biological model 22 History of engineering and technology 21 Models, Neurological 21 Neurosciences 21 Female 20 clinical article 20 Humanities 19