Scientific: Medical - Guillaume-Amant Duchenne de Boulogne
Guillaume-Amant Duchenne de Boulogne Mécanisme de la Physionomie humaine ou Analyse Électro-Physiologique de l'Expression des Passions
(Paris: Libraire J.B. Baillière et fils, 1876)
By using electrical charges directly on the face to stimulate nerves and muscles Guillaume-Amant Duchenne de Boulogne (1806-1875) made considerable advances into neurophysiology. To photograph his results he collaborated with Adrien Alban Tournachon (1825-1903) the younger brother of Nadar.
