Expected ResultsĪn EMG can help diagnose a variety of neuromuscular problems. The combined tests usually take no more than an hour, depending on the body area being tested. You may experience minor discomfort as the signals are sent, but it generally doesn’t cause pain.

The end of the needle will pick up signals from contracted muscles and measures and records that activity on a special device, which may emit audible clicks or numerical values, depending on the device being used.īecause an EMG typically occurs in conjunction with a nerve conduction study, an electrode sticker is placed some distance from the muscle, and it deliver a minor electrical current, which should prompt the muscle to work. What Happens During an EMGĪn EMG and NCS may be administered by a physician, technologist, or a lab coordinator.ĭuring an EMG, a needle electrode will be inserted into the muscle being tested. You may be advised to wear loose clothing, depending on the area being tested. Otherwise, follow your doctor’s instructions if any other preparation is needed based on your current health. Your doctor should be notified of the medications you take, whether you use a pacemaker, an implanted device that helps to regulate your heartbeat, if you have epilepsy, or any metal implants in your body. It is also inadvisable not to smoke before an EMG. You should also avoid drinking caffeinated beverages at least 2 – 3 hours prior to testing. It is recommended that you avoid using moisturizers before an EMG. It can identify whether the problem is with your signaling of your nerves, rather than the muscle itself. This test measures how fast and strong signals travel from one location to another. An EMG can identify whether the problem you are experiencing is with your muscle.ĮMGs usually are performed at the same time as a nerve conduction study (NCS), in which electrodes are placed on top of the skin and used to send electrical signals to the muscle being tested. The test is also used to identify whether electrical activity is present when it shouldn’t be (that is, when the muscle is at rest). The test is used to measure electrical activity in particular muscles when contracted. Electromyography (EMG) is a diagnostic test administered to people who may be experiencing muscle or nerve pain, including cramping, tingling, numbness, or weakness.Īn EMG involves needle electrodes inserted into the muscle being tested.

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