Goodheart GJ, The Respiratory Function of the Skull Dig Chiropractic Economics, May/Jun 1966; 8 (6): 20,66.

Most patients, and many doctors, are unaware of the fact that the bones of the skull move a definite pattern with respiration, specific movements occurring on inspiration and on expiration. Sutherland first observed this skull articular mobility in his casual observation that the beveled articular surfaces of the sphenoid suggested a resemblance to the gills of a fish with the obvious connection of a human respiratory skull movement. The intelligent application of cranial technic is just one more way the doctor of chiropractic can put service above self, help more of his/her patients with the truths of anatomy and physiology, and allow a greater concept of the inestimable value of chiropractic therapy to reach more people more effectively.