Blum CL, Biodynamics of the Cranium: A Survey Proceedings: Conference on Current Topics in Chiropractic: Reviews of the Literature May 19-20 1984; F3: 1-15.

Revamping a possible archaic view of normal cranial physiological biodynamics is a challenging undertaking. New ideas lie fragile for years awaiting the slow accumulation of evidence. This article presents substantial research answering the questions: (1) Is it possible for the cranial bones to move? (2) Do intracranial pressure changes actually translate into cranial motion? (3) Are there pressure changes of cerebrospinal fluid occurring intracranially due to vascular, pulmonary, and other theorized pulse waves?
(4) What can interfere with the transmission of these pressure waves? (5) What could be the consequences of increased and/or decreased cranial motion to the health of the body?

The author presents literature noting that dural tension and/or brain/spinal cord tension reflecting in the neural substance, nerves and associated blood vessels could well lead to changes of a pathological nature. This could be separate or could be in conjunction with associated CSF buildup of catabolites and resultant patho-physiological changes. The effect of cranial bone stasis or tension is clinically alleviated through gentle subtle manipulations of the cranial bones. The treatment is focused towards obtaining relaxation of the soft tissues of the brain and spinal cord in situ, through the dural extension into the sutures and cranial bones.