An attractive way to think of the brain is as an atlas of the mind. Continents of brain cells are given monikers such as “emotion” and “perception.” Within them, independent countries go by names such as “vision” and “audition.”
The labels are not without reason. Landmark cases of people with unique forms of brain damage have allowed neuroscientists to isolate specific regions that appear vital to a particular skill or psychological process. And no case is more famous in neuroscience than that of Henry Molaison, better known as H.M.