FACIAL expressions of emotion are innate...
A genuine - or Duchenne - smile uses more muscles and cause the eyes to twinkle and narrow and the cheeks to rise. The Duchenne smile is named after the 19th-century French neurologist Guillaume Benjamin Amand Duchenne, who discovered that a smile resulting from happiness involved the eyes and the mouth.
Sunday, January 04, 2009
Duchenne smile
There's a 'social smile' and a Duchenne smile...
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