Differentiation of bite force response in the rat.
D000818:Animals; D001522:Behavior, Animal; D003216:Conditioning, Operant; D004193:Discrimination Learning; D004326:Drinking; D008297:Male; D008410:Masticatory Muscles / Q000502:physiology; D009043:Motor Activity; D051381:Rats; D012054:Reinforcement, Psychology