Duchenne smile

Duchenne was interested in the mechanics of facial expressions, including how the muscles of the face contract to produce a smile.

The Duchenne‘ smile is long and intense, though it involves the contraction of just two muscles. First the zygomatic major, which resides in the cheek, tugs at the corners of the mouth, then the orbicularis oculi, which surrounds the eye, pulls up the cheeks, leading to the characteristic ‘twinkling eyes’.

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