St. Luke understood the brain to be the home of mental faculty and the situation never really changed. Especially once Aristotle re-appeared, the brain was defi

St. Luke understood the brain to be the home of mental faculty and the situation never really changed. Especially once Aristotle re-appeared, the brain was definitely understood as an organ that processes sensory input can be affected like other organs. Caffeine, exercise, possibility of surgery all known. Brain speculated to be involved in comas. Existence of neurons speculated.