Doctors of chiropractic care educated as primary contact health care providers, with an emphasis on diagnosis and treatment of conditions related to the musculoskeletal system (the muscles, ligaments, and joints of the spine and extremities) and the nerves that supply them. Educational requirements for doctors of chiropractic are among the most stringent of any of the health care professions. The typical applicant for chiropractic college has already acquired nearly four years of pre-medical undergraduate college education, including courses in biology, inorganic and organic chemistry, physics, psychology, and related lab work. Once accepted into an accredited chiropractic college, the requirements become even more demanding — four to five academic years of professional study are the standard. Doctors of chiropractic are educated in orthopedics, neurology, physiology, human anatomy, clinical diagnosis including laboratory procedures, diagnostic imaging, exercise, nutrition rehabilitation, and more. Because chiropractic care includes highly skilled manipulation/adjusting techniques, a significant portion of time is spent in clinical technique training to master these important manipulative procedures. In total, the chiropractic college curriculum includes a minimum of 4,200 hours of classroom, laboratory and clinical experience. The course of study is approved by an accrediting agency that is fully recognized by the U.S. Department of Education.