Individuals proceed through life by unveiling aspects of themselves as they mature. I doubt that they end up with characteristics additional to those with which they were born. In the same way, osteopathy as conceived by Still yields up facets of its inner truths with every new worker in the field. Sutherland was osteopathy's facet developer of inspired and painstaking quality. His product deserves the title cranial osteopathy.
Every function depends upon an impulse generated in some part of the brain.
If no impulse is generated the spinal cord has nothing to carry to any destination in the body. The brain makes recovery possible. The message has to be developed before it can be delivered. Cranial osteopathy is not aggressive. It does not try to move the immovable.