A nerve conduction velocity test is often done at the same time as an electromyogram ( EMG).Īn EMG is carried out in order to exclude or detect muscle conditions which mayīe present due to muscular or neurologic disease. Another test that can be done to see if the nerves are involved is called an electromyography (EMG) or a nerve conduction study (NCS). A decreased speed of transmission indicates nerve disease If the physician is concerned that you might have a pinched nerve, then the best tests would be an MRI of the neck or occasionally a computed tomography (CT) scan. The distance between electrodes and the time it takes for electrical impulses to travel between electrodes are used to calculate the speed of impulse transmission (nerve conduction velocity). The resulting electrical activity is recorded by the other electrodes. One electrode stimulates the nerve with a very mild electrical impulse. Help diagnose nerve disorders, such as carpal tunnel syndrome or Guillain-Barr syndrome. This is usually done with surface patch electrodes (they are similar to those used for an electrocardiogram) that are placed on the skin over the nerve at various locations. Nerve conduction studies are done to: Find and evaluate damage to all the nerves that lead away from the brain and spinal cord to the smaller nerves that branch out from them. In this test, the nerve is electrically stimulated, and the electrical impulse 'down stream' from the stimulus is measured. This test is used to detect signs of nerve injury. What is a nerve conduction velocity test (NCV)?Ī nerve conduction velocity test (NCV) is an electrical test that is used to determine the adequacy of the conduction of the nerve impulse as it courses down a nerve.
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