Pictured more than 100 years ago, Charles. Darwin's final experiment. At that time, the subject was electrocuted and the facial expression was "confused".
The picture shows the face of a Frenchman in Darwin's collection distorted by an electric shock. The expression is "sad, anxious, and frantic."
The picture shows the final experimental photo of Darwin taken by Duchenne de Boulogne, a French neurologist, who believes that facial expressions are the stadium of the mind, and I am afraid that the subject's mind can no longer be autonomous at this time. The subjects had expressions of "scared/surprised and frightened".
The picture shows Darwin's final experiment. I really don't know what kind of pain the subject suffered, looking at the instruments held by the experimenters on both sides, the strength of the electric shock should be greatly increased. The subjects' expressions were "angry and shocked."
The picture shows Darwin studying the muscles of the human face by means of electric shock, and the subject's expression is "fear/shock". Soon after, Darwin published a book on the effects of electric currents on human facial expressions.
The picture shows the facial expression of the volunteer who was shocked by the electric shock under the stimulation of the electric current - surprise. Without exception, they are distorted faces, and scientific progress is often accompanied by the pain of explorers.
Darwin's horrific electric shock experiment was creepy to watch. It is estimated that after this torture, the subjects are better off alive than dead, paying tribute to these great subjects, willing to be guinea pigs, and promoting the progress of human science.