Cranial Osteopathy was discovered and taught by William Garner Sutherland (1873-1954). He realised the eight bones that form the cranium had a subtle rhythmic motion and that the cranial sutures were not fused as medical anatomists had proposed. He termed this motion the Primary Respiratory Mechanism essential to normal function throughout the body. Birth trauma and injuries to the head or pelvis can reduce this motion affecting the flow of nutrients around the brain and spinal cord which the rhythm facilitates. Sutherland’s five principles were: The inherent motility of the brain and spinal cord. The fluctuation of cerebrospinal fluid. The mobility of intracranial and intraspinal membranes. The articular mobility of the cranial bones. The involuntary mobility of the sacrum between the ilia. Research undertaken at the University of Michigan into cranial sutures has revealed blood vessels nerves and connective tissues that demonstrate they are normal functional joints. NASA researchers confirmed that small motion at the sutures was possible. Our skilled practitioners can assess the cranium in newborns children adults and use the gentlest of pressures to release restrictions in sutures and intracranial membranes.