Depression in infant monkeys separated from their mothers.
The mothers of four pigtail (Macaca nemestrina) infants living in a group were removed for 4 weeks. All infants reacted initially with agitation. Three of the four infants then became severely depressed. The depression lasted about a week and was strikingly similar to the "anaclitic depression" of human infants who lost their mothers. When they were reunited, all four dyads showed a marked and prolonged intensification of the mother-infant relationship.
D000818:Animals; D001522:Behavior, Animal; D003863:Depression; D000882:Haplorhini; D006801:Humans; D008426:Maternal Deprivation; D010287:Parent-Child Relations