Raymond Nimmo

Raymond L. Nimmo graduated from the Palmer School of Chiropractic in 1931 and settled in Fort Worth, Texas. Eager to learn, he first studied and taught the Logan Basic Technique and other methods — until his own experience led him to a new line of thinking: a chronic shoulder complaint improved, by his own account, without any vertebra being touched, through treatment of tense muscle regions and trigger points alone. This observation convinced him that the then-prevailing notion of "bone on nerve" only inadequately explained the effect of chiropractic.

From this questioning stance Nimmo developed, over years, the Receptor-Tonus Technique, also simply called the "Nimmo Technique." It understands muscular tension and trigger points as an essential cause of disturbed nerve function and treats them with targeted, measured pressure. Notably, Nimmo worked out his insights into neuromuscular pain syndromes largely in parallel with, and independently of, the trigger-point work of the physician Janet Travell (1901–1997) — an early bridge between chiropractic and medical thinking about soft-tissue pain.

Through more than two hundred seminars, Nimmo passed his method on across Europe, Australia, Canada, Puerto Rico and the United States. In 1976 his alma mater awarded him the Daniel David Palmer Scientific Award; that same year he served as president of the Texas Chiropractic Association, and in 1984 he founded the Receptor-Tonus Council. He died in 1986 at the age of 81 in Granbury, Texas. His work is regarded as visionary and continues to be carried on by certified instructors.