What is an NCV test and why is it performed?
An NCV test determines the speed of conduction of impulses through a nerve. This test is used to diagnose nerve damage or destruction. How the test is performed The nerve is stimulated, usually with surface electrodes, which are patch-like electrodes (similar to those used for ECG) placed on the skin over the nerve at various locations. One electrode stimulates the nerve with a very mild electrical impulse. The 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 calculate the nerve conduction velocity. How to prepare for the test Normal body temperature must be maintained (low body temperature slows nerve conduction). How the test feels The impulse given may feel like an electric shock. Depending on how strong the stimulus is, the patient will feel it at varying degrees. It may be uncomfortable for some patients (though only during the actual test and th
