Prolonged Suppressive Effects of Pain on Territorial Aggression in Mice

Abstract
The effects of shock administered 1 hr. before aggression testing were compared to defeat, aggressive experience, or control procedures, using four groups of mice ( n = 10 per group). A single 5-min. defeat experience significantly decreased offense and increased defense while victory had little effect on subsequent territorial aggression (offense). Shock was similar to but not as potent as defeat in reducing offense.