In 1895 the a physician called DD Palmer examined a deaf old janitor with neck pain in his clinic. He found a bump in the neck caused by a displaced vertebra. With his hands he pushed the vertebra back into position. Surprisingly, the janitor’s hearing was restored. Palmer concluded that he could cure deafness, but actually something else had happened: by adjusting the stuck vertebra in the neck the nerve function towards the ears was restored resulting in restoration of the hearing. This observation represents the foundation of chiropractic and explains how adjustments of the spinal cord can both help to resolve back problems as well as complaints in other parts of the body (eg. Heart beat sensations, intestinal problems).