Often performed at the same time, an Electromyography (EMG) test and a Nerve Conduction Velocity (NCV) test are comprehensive and accurate tests that will help your physician assess whether you have muscular or nerve damage.ĭuring electrodiagnostic testing, both EMG and NCV calculate the amount of electrical activity of your muscles and nerves. If you want to get to the bottom of what’s causing the discomfort, a couple of highly effective tests will give you the answers you seek. When your muscles are weak or sore, or when you experience tingling, numbness or any other abnormal sensation there is a strong possibility that there is a problem with your muscles or nerves.