Two chiropractors from Michigan, Dr. Ralph R. Gregory and Dr. John Grostic Sr., in 1941 worked together in developing a more accurate method of restoring and rebalancing the body by correcting a misalignment in the upper cervical spine.
Dr. Ralph Gregory, a gifted healer and visionary, formed the National Upper Cervical Chiropractic Association (NUCCA), a fraternal organization on April 16, 1966. His lifetime work was the relationship between the upper cervical spine (neck) and its profound influence on the central nervous system and the brain stem function. He also established The National Upper Cervical Chiropractic Research Association (NUCCRA)in 1971, now known as Upper Cervical Research Foundation (UCRF).