Smiles that exhibit an upturned mouth and wrinkles around the eyes are called

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Smiles that exhibit an upturned mouth and wrinkles around the eyes are called Duchenne smiles. This type of smile involves the contraction of both the zygomatic major muscle, which raises the corners of the mouth, and the orbicularis oculi muscle, which causes wrinkles around the eyes. Duchenne smiles are often associated with genuine, spontaneous happiness and are named after the French neurologist Duchenne de Boulogne, who first described them. Mom and Dutch smiles are not commonly used terms, and social smiles refer to more superficial, polite smiles that may not involve the eyes.

Smiles That Exhibit an Upturned Mouth and Wrinkles Around the Eyes