Nerve Conduction Velocity (NCV) Measurement

What Is Nerve Conduction Velocity (NCV)?

Nerve conduction velocity (NCV) measures the speed at which electrical impulses travel along nerves. It’s done by sending a small electrical stimulus to a nerve and measuring how long it takes for the signal to reach a muscle or another nerve. This test is critical for diagnosing conditions that affect nerve function, such as peripheral neuropathy, carpal tunnel syndrome, or other nerve disorders.

Why Is NCV Tested?

Doctors may recommend an NCV test if you have symptoms like numbness, tingling, weakness, or pain in your hands or feet. It can also be used to monitor nerve function in people with known nerve disorders or after injuries to the nerves.

How Is the NCV Test Performed?

The test involves placing small electrodes on your skin at different points along a nerve. A mild electrical stimulus is applied to one electrode, and the time it takes for the signal to travel to another electrode is recorded. This process is repeated for different nerves to compare their conduction speeds.

What Does NCV Tell Us?

Results show how fast or slow electrical signals travel through nerves. Abnormally slow conduction may indicate nerve damage or disease, while normal or fast conduction suggests healthy nerve function. The test helps determine the extent and location of nerve involvement.