Chiropractic care bases treatment on the functions of the nervous system. Chiropractic theory believes if the nervous system is not functioning properly that disease will develop. Treatment involves readjustment of anatomical structures that may be hindering the normal function of the nerves, most notably the spinal column. Massage also affects the nervous system but through the manipulation of muscle tissue. Massage therapists attempt to encourage free flow of fluids and energy in the body by manually manipulating body tissue.