Page "Duchenne de Boulogne" Paragraph 33
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The exact imitation of nature was for Duchenne the sine qua non of the finest art of whatever age, and although he praised the ancient Greek sculptors for unquestionably attaining an ideal of beauty, he nevertheless criticized them for their anatomical errors and failure to attend to the emotions.
Thus at the end of the scientific section, for instance, Duchenne " corrects " the expressions of three widely revered classic Greek or Roman antiquities: In no manner, argues Duchenne, do any of these countenances conform to nature as revealed by his electrophysiological research.
He even questions the Greek artist Praxiteles's accuracy in sculpting the Niobe:
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