Wilder Penfield (26 January 1891 โ 5 April 1976) was an American-Canadian neurosurgeon. He expanded brain surgeryโs methods and techniques, including mapping the functions of various regions of the brain. He was born on 26 January 1891 in Spokane, Washington, and studied at Princeton University and then at Oxford University as a Rhodes Scholar. After completing his medical training, he began working as a neurosurgeon at the Montreal General Hospital in Canada, where he would spend the majority of his career.