The special smile that infants often reserve for their mother is called the Duchenne smile

Name: The special smile that infants often reserve for their mother is called the Duchenne smile
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The Duchenne smile is a genuine smile that involves both the mouth and the eyes. It is named after the French neurologist Guillaume Duchenne, who first described it in 1862. The Duchenne smile is often seen in infants when they are interacting with their mothers.

The Special Smile That Infants Often Reserve for Their Mother