Murray Llewellyn Barr OC FRSC FRS[1] (June 20, 1908 – May 4, 1995) was a Canadian physician and medical researcher who discovered with graduate student Ewart George Bertram, in 1948, an important cell structure, the "Barr body".
Murray Barr published two books, The Human Nervous System and A Century of Medicine at Western.
"The Human Nervous System" was used as the primary neuroanatomy textbook by medical students for several years.
In 1962, he won a Joseph P. Kennedy Jr. Foundation Award for his contributions to the understanding of the causes of mental retardation.
In 1963, he received the Gairdner Foundation International Award and in 1972 he was elected a fellow of the Royal Society of London.