There are a number of conditions that the EMF/NCS will help identify including: In most cases, your doctor will perform both, but in some situations, only one or the other may be done. NCS detects a problem with the nerve, while an EMG detects whether the muscle is working properly in response to the nerve’s activity. NCS is often used along with an EMG to help differentiate between a nerve disorder and a muscle disorder. The speed the impulse moves through your nerve is then calculated by measuring the distance between electrodes and the time it takes for electrical impulses to travel between electrodes. This test may be repeated as needed for each nerve being tested. The other electrode records the activity. One stimulates the nerve with a mild electrical impulse.
The test is administered by placing two electrodes on the skin over your nerve. What is a Nerve Conduction Study (NCS)? How does it work?Īn NCS measures how fast an electrical impulse moves through your nerve which helps identify nerve damage. An EMG nerve test can provide your doctor with specific information about the extent of nerve and/or muscle injury and can pinpoint the exact location of the injury and give some indication of whether or not the damage is reversible. It is commonly performed by a physiatrist, neurologist or physical therapist with special training for this procedure. During the test, one or more small needles (also called electrodes) are inserted through the skin into the muscle. The test is used to help detect neuromuscular abnormalities. What exactly is Electromyography (EMG) testing? How does it work?Īn Electromyography (EMG) measures muscle response or electrical activity in response to a nerve’s stimulation of the muscle.
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