EMG and NCV Tests

Electromyography and Nerve Conduction Velocity (EMG and NCV) tests are used to measure the electrical impulses from nerves and muscles to learn more about the location or extet of conditions that affect the nerves and muscles. Commonly used for patients with weakness, numbness or nerve pain, these tests employ both needles and light electrical impulses.

Before the Test
Be sure to tell your doctor if you have any heart trouble, pacemaker, defibrilator or irregularities in your EKG. Do not drink any coffee or caffeine drinks the day of the test and do not smoke for four hours before the test.

During the Test
These procedures are usually completed at the same time. Small needles or light electrical impulses are used and do cause some discomfort. The results are recorded on a special monitor called an osccilloscope. Multiple locations are required to get a complete study of the nerve and muscle function. The test lasts between 30 and 90 minutes.

After the Test
The muscle may be sore for a few days. Use ice packs to relieve any discomfort. Your physician will review the results with you.