A nerve conduction velocity test determines how quickly electrical impulses travel through the body's nerves. Learn about the nerve conduction velocity, or NCV, test's application, typical outcomes, and potential adverse effects in this article. NCV as a diagnostic tool An NCV test is used to check for nerve injury. An electrical current is used to directly stimulate a nerve during the test to observe how it responds. A range of muscular and neuromuscular diseases can be diagnosed with NCV tests. In some cases, electromyograms, often known as EMGs, are performed along with NCV tests. EMGs are also used by doctors...