Chiropractic was initially coined in the American English language in 1898 from the Latin words chiro- "hand" + praktikos "practical". The definition loosely meant as "done by hand." Today the term has evolved to Doctor of Chiropractic and Chiropractic Physician but the principles of healing with the hands still remains.

Chiropractic is a health care profession that focuses on disorders of the musculoskeletal system and the nervous system, and the effects of these disorders on general health. Chiropractic care is used most often to treat neuromusculoskeletal complaints, including but not limited to back pain, neck pain, pain in the joints of the arms or legs, and headaches.

Doctors of Chiropractic – often referred to as chiropractors or chiropractic physicians – practice a drug-free, hands-on approach to health care that includes patient examination, diagnosis and treatment. Chiropractors have broad diagnostic skills and are also trained to recommend therapeutic and rehabilitative exercises, as well as to provide nutritional, dietary and lifestyle counseling.

The most common therapeutic procedure performed by doctors of chiropractic is known as "spinal manipulation," also called "chiropractic adjustment." The purpose of manipulation is to restore joint mobility by manually applying a controlled force into joints that have become hypomobile – or restricted in their movement – as a result of a tissue injury. Tissue injury can be caused by a single traumatic event, such as improper lifting of a heavy object, or through repetitive stresses, such as sitting in an awkward position with poor spinal posture for an extended period of time. In either case, injured tissues undergo physical and chemical changes that can cause inflammation, pain, and diminished function for the sufferer. Manipulation, or adjustment of the affected joint and tissues, restores mobility, thereby alleviating pain and muscle tightness, and allowing tissues to heal.

Chiropractic adjustment rarely causes discomfort. However, patients may sometimes experience mild soreness or aching following treatment (as with some forms of exercise) that usually resolves within 12 to 48 hours.

In many cases, such as lower back pain, chiropractic care may be the primary method of treatment. When other medical conditions exist, chiropractic care may complement or support medical treatment by relieving the musculoskeletal aspects associated with the condition.

Doctors of chiropractic may assess patients through clinical examination, laboratory testing, diagnostic imaging and other diagnostic interventions to determine when chiropractic treatment is appropriate or when it is not appropriate. Chiropractors will readily refer patients to the appropriate health care provider when chiropractic care is not suitable for the patient's condition, or the condition warrants co-management in conjunction with other members of the health care team.

Chiropractic Education 

Educational requirements for doctors of chiropractic are among the most stringent of any of the health care professions.

The typical applicant at a 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. Because of the hands-on nature of chiropractic, and the intricate adjusting techniques, a significant portion of time is spent in clinical training.

Doctors of chiropractic — who are licensed to practice in all 50 states, the District of Columbia, and in many nations around the world — undergo a rigorous education in the healing sciences, similar to that of medical doctors. In some areas, such as anatomy, physiology, and rehabilitation, they receive more intensive education than most medical doctors or physical therapists.

Like other primary health care doctors, chiropractic students spend a significant portion of their curriculum studying clinical subjects related to evaluating and caring for patients. Typically, as part of their professional training, they must complete a minimum of a one-year clinical-based program dealing with actual patient care. In total, the curriculum includes a minimum of 4,200 hours of classroom, laboratory and clinical experience. The course of study is approved by an accrediting agency which is fully recognized by the U.S. Department of Education. This has been the case for more than 25 years.

Before they are allowed to practice, doctors of chiropractic must pass national board examinations and become state-licensed. Chiropractic colleges also offer post-graduate continuing education programs in specialty fields ranging from sports injuries and occupational health to orthopedics and neurology. These programs allow chiropractors to specialize in a healthcare discipline or meet state re-licensure requirements.

This extensive education prepares doctors of chiropractic to diagnose health care problems, treat the problems when they are within their scope of practice and refer patients to other health care practitioners when appropriate.

^{References
1- Meeker W, Haldeman H. Chiropractic: A Profession at the Crossroads of Mainstream and Alternative Medicine. Annals of Internal Medicine 2002, Vol 136, No 3.}

^{2- American Physical Therapy Association. 2005-2006 Fact Sheet, Physical Therapist Education Programs. January 2007.}