Physical pain and the inclination to aggression.
D000339:Affect; D000374:Aggression / Q000523:psychology*; D000818:Animals; D001143:Arousal; D001245:Association Learning; D003071:Cognition; D004924:Escape Reaction; D006801:Humans; D010146:Pain / Q000523:psychology*; D011678:Punishment; D051381:Rats; D012018:Reflex; D012684:Sensory Thresholds; D012718:Set, Psychology