The electromyography is used in order to diagnose nerve damage and muscle disorders. In principle, every muscle movement is controlled by electric impulses. The intensity of the impulse determines the strength of the muscle tension.
In order to measure the electricity which occurs during the conscious and unconscious tension of the muscles, an adhesive electrode is placed onto the skin or a thin needle electrode is inserted into the muscle respectively.
In the case that the measured impulses are weaker than usual, the consulting doctor can conclude that the nerve roots or the spinal cord is damaged. Sometimes, in order to finalise the diagnosis, the consulting doctor may suggest a nerve conduction velocity test (NCV).