However, only one of these is a “genuine” or Duchenne smile. Discovered by French anatomist Duchenne de Boulogne in 1862, the key difference between this “real” happy smile and a “fake ...

Duchenne Muscular Dystrophy (DMD) is a rare progressive disorder. People with DMD are missing muscle-protecting protein. This is due to a fault in the gene producing dystrophin. Muscles to become ...