is a branch of the health sciences which is concerned with the structural health of the human body. Chiropractors place particular emphasis on the nervous system, particularly the spinal column, and its relationship to proper function. Doctors of chiropractic are health care providers who consider man as an whole being giving particular attention to spinal biomechanics while recognizing the body's natural healing powers. Chiropractic is a drug free, non-surgical science and as such does not include prescription pharmaceuticals or invasive surgery. In addition to chiropractic manipulative therapy, doctors of chiropractic may employ such procedures as physiotherapy and nutritional supplementation in caring for their patients.Chiropractors often specialize in the diagnosis and treatment of work, auto and sports related injuries.