What is NCV Test?
NCV (Nerve Conduction Velocity) test measures how fast electrical signals move through your nerves. It is often performed along with EMG (Electromyography), which measures the electrical activity of muscles. Together, NCV and EMG help diagnose peripheral nerve and muscle disorders, and are essential for conditions like carpal tunnel syndrome, diabetic neuropathy and Guillain-Barré syndrome.
Why is NCV Test Done?
- Carpal tunnel syndrome
- Diabetic neuropathy
- Peripheral nerve injuries
- Guillain-Barré syndrome
- Radiculopathy (nerve root compression)
- Muscular dystrophy and myopathies
Frequently Asked Questions
Is NCV test painful?
NCV involves small electrical pulses which may feel like a mild tingling or brief muscle twitch. EMG involves a fine needle inserted into muscles, which may cause mild discomfort. Most patients tolerate both tests well.
How to prepare for NCV?
Avoid applying lotion or oil on your skin on the day of the test. Wear loose, comfortable clothing. Inform the technologist about any medications you are taking.
How long does NCV test take?
NCV alone takes about 30–45 minutes. Combined NCV + EMG may take 1–2 hours depending on the number of nerves and muscles tested.