Ernest W. Retzlaff

Ernest Walter Retzlaff, Ph.D. (February 19, 1918 – 1989) was an American neurophysiologist and histologist who helped develop a form of manipulative healing therapy called Craniosacral therapy with Dr. John Upledger at Michigan State University in the 1970s.

In 1987, he published "The Cranium and Its Sutures: Anatomy, Physiology, Clinical Applications and Annotated Bibliography of Research in the Cranial Field" (Springer-Verlag) with his colleague Fredric L. Mitchell, Jr.

He was born to German immigrant parents in Helena, Montana, on Feb. 19, 1918.