Chiropractic is a form of alternative medicine mostly concerned with the diagnosis and treatment of mechanical disorders of the musculoskeletal system, especially the spine.Some proponents, especially those in the field’s early history, have claimed that such disorders affect general health via the nervous system, through vertebral subluxation, claims which are contrary to scientific evidence. The main chiropractic treatment technique involves manual therapy, especially spinal manipulation therapy (SMT), and manipulations of other joints and soft tissues. Its foundation is at odds with mainstream medicine, and chiropractic is sustained by pseudoscientific ideas such as subluxation and “innate intelligence” that reject science.Chiropractors are not medical doctors.