This literally means manual medicine and was practised by doctors as early as the time of Hippocrates. Modern-day chiropractic medicine was introduced in 1895; today it is the largest healing profession that does not utilize drugs. In essence the treatment is non-medical and non-surgical. Chiropractic medicine concentrates on preventing and treating diseases through psychological counselling, sanitation, hygiene, nutrition, and the manipulation of the spine and other joints. The basis of the practice is essentially that the regimes instituted restore normal function to the joints of the body, which subsequently helps the patient regain health. Osteopathic medicine is largely similar to chiropractic medicine and they have both evolved from the same practice. Chiropractors utilize X-rays more frequently than osteopaths, and in general are believed to be better able to cure back pain and promote general good health. In general, osteopathy involves manipulation of the body and, more specifically, the spinal column, with rhythmic movements and massage to areas that may be causing constriction of nerves and blood vessels. Again, osteopaths claim to heal a number of illnesses.