Overview
Electromyography (EMG) is a test that assesses the function of your muscles and nerves, typically conducted in two parts. The first part, a nerve conduction study, measures the efficiency of electrical impulses traveling through your nerves. The second part involves a needle electromyogram, which records the electrical signals produced by your muscles during movement. These results aid doctors in identifying issues associated with specific disorders or conditions.
Nerve Conduction Study
Before the test, you may be given a hospital gown to wear. You lie on an exam table. For the nerve conduction study, some small, disc-shaped electrodes are taped on your skin. Very low levels of electricity are sent through these electrodes. A computer measures how quickly the signals pass from one electrode to another.
Needle Electromyogram
For the needle electromyogram, a special needle is placed into one of your muscles. You relax the muscle, and then you contract it. The needle measures how much electricity your muscle generates. The needle may be put in several different muscles during your test.
Conclusion
After completing the test, you can return home. It’s common to experience muscle tenderness for a few days afterward. Your healthcare provider will analyze the exam results and discuss them with you during a follow-up visit.
