Its cells contract to make bones move and joints bend. The knee joint has two muscles that move the shin up or down. These are the hamstrings and the quadriceps. To pull the shin backwards (before ...

ALS and other spinal muscular atrophies Diseases of the peripheral nerves Metabolic diseases of the muscle – muscular dystrophies Myopathies, myositis, myotonias, vasculitis The Shin J. Oh, Muscle and ...