We will first study a pool of 15 normal control subjects to refine our data acquisition and postprocessing tools, and to sample quantitative diffusion based data for the normal cervical spine. A second group of subjects will include 10 patients with significant cervical spondylosis and upper extremity radiculopathy without myelopathy. The third group will be 10 patients with cervical spondylosis and signs and symptoms of myelopathy. The two patient groups will allow us to define systematic differences between normal values and values in the injured spine.