smile ..

a genuine smile involves two facial muscles

  • the zygomatic major muscle, which stretches from the cheekbone and lifts the corners of the mouth ;
  • the outer part of the obicularis oculi muscle, wgich orbits the eye, and is involved in ” pulling down the eyebrows and the skin below the eye-brows, pulling up the skin below the eye, and raising the cheeks.”
Artificial smiles involve only the zygomatic major. the reason : we can control that msucle, but we cant control the relevant part of the obicularis oculi muscle. It contracts spontaneously – and only when we’re actually experiencing enjoyment. As Duchenne himself put it, ” The emotion of frank joy is expressed by the combined contarction of the zygomaticus major muscle and the obicularis ocali. The first obeys the will but the second is only put into play by the sweet emotions of the soul.”

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