: This discovery directly contradicted the prevailing medical consensus that adult skull bones are fused and immovable.
: Sutherland's central theory describes an inherent rhythmic motion distinct from cardiac and pulmonary cycles. Core Principles of the Cranial Concept Cranial Osteopathy
: While examining a disarticulated skull, Sutherland noticed the temporal bones were beveled like fish gills, suggesting they were designed for respiratory-like movement. Cranial Osteopathy