You will feel a brief, sharp pain when a needle electrode is inserted into the muscle. An electrode that combines a reference point and a needle for recording is inserted into the muscle. Typically, the skin over the area being tested will be cleaned with an antiseptic. You will be asked to lie on a table or sit in a reclining chair so that the muscles being tested are relaxed and easy to reach. You may be given a hospital gown to wear. Wear loose-fitting clothing that permits access to the muscles and nerves to be tested.

Have had bleeding problems or are taking blood thinning drugs, such as warfarin (Coumadin®) or heparin.ĭo not smoke for at least three hours before the test.You may need to stop taking these three to six days before the test. Certain drugs that act on the nervous system (such as muscle relaxants) can interfere with electromyography results. There are no major risks associated with this test. The test involves placing small needles into the muscles. Problems in a muscle, the nerves controlling a muscle, the spinal cord or the brain can all cause these kinds of symptoms.Įlectromyograms are useful in determining whether there has been pressure on a nerve or nerve root degeneration. Find out the cause of weakness, paralysis, involuntary muscle twitching or other symptoms.These disorders include a herniated disc, amyotrophic lateral sclerosis (ALS) or myasthenia gravis. Diagnose diseases that damage muscle tissue, nerves or the points where nerve and muscle join.

Nerve conduction studies measure how well individual nerves transmit electrical signals to the muscles. Electromyography is usually done with nerve conduction studies. Electromyography measures the electrical impulses of the muscles at rest and when contracted.

Pain after emg test