The effect of caffeine, theophylline and amphetamine on operant responding of the mouse.
D000661:Amphetamine / Q000494:pharmacology*; D000818:Animals; D002110:Caffeine / Q000494:pharmacology*; D003216:Conditioning, Operant / Q000187:drug effects*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D012055:Reinforcement Schedule; D013806:Theophylline / Q000494:pharmacology*
D002110:Caffeine; D013806:Theophylline; D000661:Amphetamine