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When babies first display their social smile is it a result of social stimulus or the maturation of the fusiform face area of the brain?

April 26, 2017area babies display Face fusiform maturation Smile social stimulus

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When babies first display their social smile is it a result of social stimulus or the maturation of the fusiform face area of the brain?

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This is a very interesting question, and I don’t know whether studies of the fusiform area have been done in very small infants. Several studies have shown that what’s really going on is the infant is training the mother by offering her smiles when she does something that pleases the infant.