Within the craniosacral system is the cerebrospinal fluid that moves in a slight but perceptible tide-like manner. Craniosacral therapists assist in facilitating change in areas of restriction where this tide-like motion is limited, confined, and immobilized. By using a gentle light touch, this fluid becomes more rhythmic and balanced, and the central nervous system is restored. Craniosacral therapy is helpful to those with nervous disorders, motor-coordination impairments, attention deficit disorders, insomnia, and other problems. Cranisacral therapy was originally developed in the early 1900's by an osteopath named William G. Sutherland and later refined and promoted by Dr. John Upledger.