Chiropractic Therapy is based on the philosophy that ailments can be treated by manipulating the musculoskeletal system. Practitioners work on the theory that the diagnosis and treatment of disease is related to the manner in which the nervous system functions. The body structure especially that of the backbone and body functions are considered to be intimately related. Disease can be caused by the nervous system being agitated by chemical, mechanical, or even psychic forces. Chiropractors attempt to bring relief by manipulating the vertebrae so that the nerves in the region may be released of stress. Chiropractic also includes chiropractic acupuncture.