What is “Nerve Conduction Velocity?” (NCV)
Nerve conduction velocity (NCV) is a test to see how fast electrical signals move through a nerve.
How the test is performed.
Patches called surface electrodes, similar to those used for ECG, are placed on the skin over nerves at various locations. Each patch gives off a very mild electrical impulse, which stimulates the nerve.
The nerve’s resulting electrical activity is recorded by the other electrodes. The distance between electrodes and the time it takes for electrical impulses to travel between electrodes are used to determine the speed of the nerve signals.
Electromyography (recording from needles placed into the muscles) is often done at the same time as this test.
How should you prepare for the tests?
How long do the tests take?