[A comparative evaluation of the effect of removal of the epiphysis and damage to the amygdala on the behavioral reactions of rats].

Pinealectomy and lesions of the amygdala variously changed aggression of rats after social isolation and behavior in a conflict situation. It is suggested that the pineal gland by means of secreted melatonin suppresses the function of the limbic structures. It may regulate the pineal-amygdaloid relationships and play an important role in the organization of emotional behaviour.