Jean Pierre Flourens
Flourens was able to show for the first time that the main parts of the brain were responsible for largely different functions. By removing the cerebral hemispheres, for instance, all perceptions, voluntary action, and judgment were abolished. The removal of the cerebellum affected the animal's equilibrium and motor coordination, while the destruction of the brainstem (medulla oblongata) caused death. These experiments led Flourens to conclude that: