Although he was neither fully original nor correct in his description of a senso comune, he was right in his general view that the human brain receives visual and other stimuli, processes them into perceptions, then transmits reactions through the nervous system to the muscles. More important, his fascination with the connection between the mind and the body became a key component of his artistic genius: showing how inner emotions are manifest in outward gestures.
( Walter Isaacson )
[ Leonardo da Vinci ]
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