Among the topics considered at the first two Diagnosis Dialogue sessions was the notion that diagnoses made by physical therapists should be grounded in the human movement system. In 1998, Shirley Sahrmann1 brought to our attention the Stedman’s Dictionary definition of the movement system as “a physiologic system that functions to produce motion of the body as a whole or of its component parts.” My own recent “look-up” of the term movement system in Tabor’s Cyclopedic Medical Dictionary revealed that physical therapists are currently the first among those considered to be trained to manage components of the movement system. Tabor’s defines the human movement system as: