The primary and most significant difference between the practice of Osteopathy in the Cranial Field and Cranio-Sacral therapy is the level of training of the practitioner. William Garner Sutherland, DO, introduced his cranial concept in 1929. Dr. Sutherland saw Cranial Osteopathy as a modality of diagnosis and treatment to be provided by licensed physicians as part of a comprehensive osteopathic treatment. As such, it is not merely a therapy, but an integral part of the physician’s overall management of their patient’s Healthcare.