Walter Rudolf Hess (17 March 1881 – 12 August 1973) was a Swiss physiologist. He won the Nobel Prize in Physiology or Medicine in 1949 for "locating the areas of the brain involved in the control of internal organs". The prize was shared with Egas Moniz. Hess was born on 17 March 1881 in Frauenfeld, Switzerland and died on 12 August 1973 in Locarno, Switzerland.