Electromyography (EMG) measures muscle response or electrical activity in response to a nerve's stimulation of the muscle. The test is used to help detect neuromuscular abnormalities. During the test, one or more small needles (also called electrodes) are inserted through the skin into the muscle.
Why is it important? Helps find diseases that damage muscle tissue, nerves, or the junctions between nerve and muscle. These problems may include a herniated disc, amyotrophic lateral sclerosis (ALS), or myasthenia gravis (MG). Is a resource in finding the cause of weakness, paralysis, or muscle twitching. Problems in a muscle, the nerves supplying a muscle, the spinal cord, or the area of the brain that controls a muscle can cause these symptoms.
At the time of an EMG appointment, the patient's skin should be clean without lotions, oils or creams. No special preparation is required. The patient can take all medications as prescribed by his or her referring physician. Please bring a complete list of your current medications. There are no aftereffects of the EMG test and the patient can return to his or her usual activities immediately upon leaving the laboratory.