A condition in which the body's immune system attacks part of the peripheral nervous system. NCS detects a problem with the nerve, whereas an EMG detects whether the muscle is working properly in response to the nerve's stimulus.ĭiseases or conditions that may be checked with NCS include: NCS is often used along with an EMG to tell the difference between a nerve disorder and a muscle disorder. WHY MIGHT I NEED A NERVE CONDUCTION TEST? Both tests help find the presence, location, and extent of diseases that damage the nerves and muscles. It is often done at the same time as an NCV. This measures the electrical activity in your muscles. The speed is then calculated by measuring the distance between electrodes and the time it takes for electrical impulses to travel between electrodes.Ī related test that may be done is an electromyography (EMG). This is repeated for each nerve being tested. The resulting electrical activity is recorded by another electrode. One electrode stimulates your nerve with a very mild electrical impulse. Two electrodes are placed on the skin over your nerve. NCV can identify nerve damage.ĭuring the test, your nerve is stimulated, usually with electrode patches attached to your skin.
A nerve conduction velocity (NCV) test - also called a nerve conduction study (NCS) - measures how fast an electrical impulse moves through your nerve.
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