The influence of learning on morphine analgesia and tolerance development in rats tested on the hot plate.
D000698:Analgesia; D000818:Animals; D001362:Avoidance Learning; D001522:Behavior, Animal; D004361:Drug Tolerance; D006358:Hot Temperature; D008297:Male; D009020:Morphine / Q000008:administration & dosage; D051381:Rats; D011930:Reaction Time / Q000187:drug effects
D009020:Morphine