Meridians are passages, through which qi and blood circulate and by which viscera are interrelated. The upper and the lower, the interior and the exterior parts of the body are communicated, and functions of every part of the body are regulated. Life activity of the human body, occurrence of diseases and effect of treatment are all dependent upon meridians. So, if the disease of tendon and bone involves a meridian, it will affect the function of organs through which the meridian runs, resulting in symptoms in the corresponding parts of the body. For example, myelopathy or diseases of peripheral nerve may cause paralysis.