The text discusses the ideas of Leonardo da Vinci regarding the connection between the mind and body, highlighting his understanding that stimuli from the environment are processed by the brain. Although his concept of senso comune wasn't entirely accurate or original, he accurately described the process whereby perceptions lead to reactions via the nervous system.

This relationship between emotional experiences and physical expressions was a vital aspect of da Vinci's artistic brilliance. His ability to convey inner feelings through outward actions and gestures distinguished his work, allowing viewers to connect with the emotional depth of his creations.