Chiropractic is a drug-free, non-surgical form of therapy using manipulation of the spine and other joints to treat and prevent disease. Chiropractic is based on the fact that the nervous system controls all functions within the body. The distinguishing feature separating chiropractic from other healing arts is the emphasis on the spinal adjustment. Adjustments are applied by various means to areas of derangement within the spine and pelvis known as subluxations. Subluxations are found where the spinal joints do not move properly or where the vertebrae are malpositioned. Disturbances of the nervous system produced by subluxations are often a primary or contributing cause and/or factor in many diseases; the spinal adjustment corrects subluxations and restores health.