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Keywords:

  • rat;
  • amygdala;
  • stria terminalis;
  • interspecific aggression;
  • shock-induced aggression

Abstract

An experimentally produced hyperreactivity facilitates initiation of mouse-killing in rats that did not previously develop any stable inhibition of interspecific aggression. Destruction of the corticomedial amygdala or interruption of the stria terminalis interferes with the development of such an inhibition on the basis of “social” influences, whereas lateral amygdaloid lesions have no effect on mouse-killing.