Jean Pierre Flourens
Marie Jean Pierre Flourens (13 April 1794 – 6 December 1867), father of Gustave Flourens, was a French physiologist, the founder of experimental brain science and a pioneer in anesthesia. Through the study of ablations on animals, he was the first to prove that the mind was located in the brain, not the heart.
Clotaire Rapaille
Rapaille subscribes to the triune brain theory of Paul D. MacLean, which describes three distinct brains: the cortex, limbic, and reptilian. Beneath the cortex, the seat of logic and reason, is the limbic, which houses emotions. Camouflaged underneath those is Rapaille's theorized brain—the reptilian.