Dr. Ben Carson (born September 18, 1951, Detroit, Michigan, U.S.) is a world-renowned neurosurgeon who performed the first successful separation of conjoined twins who were attached at the back of the head (occipital craniopagus twins). The operation, which took place in 1987, lasted some 22 hours and involved a 70-member surgical team.
Dr. Carson also refined a technique known as hemispherectomy, in which one-half of the brain is removed to prevent seizures in persons with severe epilepsy.