sentences:  Roger Wolcott Sperry
  
  Roger Wolcott Sperry (August 20, 1913 – April 17, 1994) was an American neuropsychologist, neurobiologist and Nobel laureate who, together with David Hunter Hubel and Torsten Nils Wiesel, won the 1981 Nobel Prize in Physiology and Medicine for his work with split-brain research.A "Review of General Psychology" survey, published in 2002, ranked Sperry as the 44th most cited psychologist of the 20th century.