Mécanisme de la physionomie humaine
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Mécanisme de la physionomie humaine. ou, Analyse électro-physiologique de l'expression des passions des arts plastiques. is a monograph on the muscles of facial expression, researched and written by Guillaume-Benjamin-Amand Duchenne de Boulogne (1806–75). It first appeared as an abstract published in Archives générales de médecine[1] in 1862 and was then published in three formats: two octavo editions and one quarto edition. The work was an important resource used by Charles Darwin (1809–82) for his own study on the genetics of behaviour, titled The Expression of Emotions in Man and Animals,[2] and in recent years it has been reclaimed as an important landmark in the history of the photographic arts.