Morphine and shock detection: effects on shock intensity.
D000818:Animals; D004192:Discrimination, Psychological / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004597:Electroshock; D009020:Morphine / Q000494:pharmacology*; D010465:Perception / Q000187:drug effects*; D051381:Rats
D009020:Morphine