The mid-19th century duchenne (Duchenne), who observed the phenomenon of human muscle produced by electrical stimulation of muscle contraction, and he and his assistants together to stimulate different parts of the face, muscle contraction produce different changes in the expression. (Figure 2).

Mid 19th century Duchenne (DU-clan) and others look to the body muscles in electrical stimulation of the contraction of muscles, and he and his assistant with the facial stimuli in different areas, muscle contractions produce different looks. (figure 2)

19th century intermediate stage Duchenne (Du Xingshi) et al. observe the human body muscle the contracture of muscle phenomenon which produces under the electricity stimulation, he and the assistant studied together in the face stimulation different spot, the contracture of muscle has had the differ

19th century medium-term Duchenne (Du Xing), who observed that the muscles of the human body under the stimulation of muscle contraction, he studied in the face with his assistant to stimulate different parts of different facial expression changes of muscle contraction. (Ii)

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