Sublime

Just as Leonardo’s anatomy informed his art, so was the reverse true: his artistic, sculpting, drawing, and engineering skills crossed disciplines and aided his anatomical studies. In a groundbreaking experiment, he used sculpture and casting techniques to map the hollow cavities, known as cerebral ventricles, in the human brain

Leonardo da Vinci wrote, a century after Cennini: And take a note… with slight strokes in a little book that you should always carry with you… preserved with great care; for the forms, and positions of objects are so infinite that the memory is incapable of retaining them, wherefore keep these sketches as your guides and masters.