Doctor Joshua Petersmith, founder of Summit Upper Cervical Center in Saint Louis, Missouri on what Upper Cervical Chiropractic Care is, who founded it and about the research behind upper cervical chiropractic.
Upper Cervical Specific Chiropractic is a branch of chiropractic developed and promoted by B. J. Palmer beginning in the 1930s until his death. According to Upper cervical chiropractic, a vertebral subluxation can only occur in upper cervical vertebrae. Therefore this technique places great importance on the anatomical structures of the atlanto-occipital joint, pointing out that it floats on two toed-in spoon like surfaces and is a potential source of instability. This potential instability of the atlanto-occipital joint is theorized to predispose people to an “adaptational imbalance” in the head/neck region.
Source: Palmer, B.J. The Subluxation Specific, The Adjustment Specific, Vol. XVIII, p. 67