A nerve conduction (nerve velocity) test is a test of the speed of signals going through a nerve.
How the Test is Performed
Patches called surface electrodes, similar to those used for ECG, are placed on the skin over the nerve 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.
How to Prepare for the Test
Normal body temperature must be maintained (low body temperature slows nerve conduction).
Tell your doctor and technician if you have a cardiac defibrillator or pacemaker, as precautions may need to be taken.
How the Test Will Feel
The impulse may feel like an electric shock. Depending on how strong the stimulus is, you will feel it to varying degrees, and it may be uncomfortable for you. You should feel no pain once the test is finished.
