The hypoproteinaceous material of the myelin sheath. A diagnostic procedure which creates an image of the spinal cord. A dye is injected into the spinal canal, and X-ray pictures are taken of the spinal cord. This happens when the blood supply to the area is interrupted because of narrowed or blocked blood vessels. Myoclonus A single spasm or twitching of a muscle.
Clonus is the repeated spasms of muscles, due to a seizure or increased muscle tone.