The craniosacral system consists of a fluid filled membrane within which the brain, the membranes and spinal cord are bathed, protected and cushioned. It extends from the skull, the cranium, to the sacrum and the tailbone. Hence its name craniosacral. The fluid is called cerebrospinal fluid. The fluctuation of the cerebrospinal fluid within this system results in a subtle rhythm directly related to movements of the body's bones and soft tissue.
Rhythmic movement is fundamental to life.
It manifests in respiration, the heartbeat or even the tides of the planet's oceans, which depend on the lunation cycle. On an energetic level this subtle tide like motion is inherent in every cell of the body. In Craniosacral Therapy the practitioner relates to this fundamental rhythm mostly via the craniosacral system. The craniosacral system carries the deepest rhythmic current in the body. This energy current is the ordering principle that does the healing on the core level of the body mind system.