Nerve Conduction Velocity (NCV)

Nerve Conduction Velocity (NCV) Test is a specialized neurodiagnostic procedure used to assess the function and health of the peripheral nerves — the nerves that carry electrical signals between the brain, spinal cord, and the rest of the body.

The test measures how fast and efficiently electrical impulses travel through a nerve. It is commonly used to detect nerve damage, compression, or dysfunction caused by various neurological or musculoskeletal conditions.

At our center, NCV testing is performed by experienced neurophysiologists using advanced, computer-assisted equipment for precise, reliable, and comfortable evaluation of nerve health.

Purpose of the NCV Test

The NCV test helps diagnose and differentiate between nerve and muscle disorders. It is particularly useful in identifying:

• Peripheral neuropathy (due to diabetes, vitamin deficiency, or toxins)

• Nerve compression syndromes (such as carpal tunnel or tarsal tunnel)

• Radiculopathy (nerve root compression from a disc problem or spinal issue)

• Guillain-Barré Syndrome (GBS) and other demyelinating neuropathies

• Brachial or lumbosacral plexopathy

• Nerve injuries due to trauma or entrapment

• Muscle disorders when combined with electromyography (EMG)

How the Test Works

The NCV test measures how quickly electrical signals move through your nerves:

1. Surface electrodes are placed on the skin along the path of a specific nerve.

2. A mild electrical stimulus is applied to the nerve.

3. The resulting electrical activity is recorded at a different point along the nerve.

4. The speed and strength of the nerve’s response are analyzed.

The entire test is non-invasive, and while mild tingling may be felt during stimulation, it is well-tolerated by most patients.

What NCV Can Reveal

• Slowed conduction velocity: Indicates nerve damage or demyelination.

• Reduced amplitude: Suggests axonal (nerve fiber) injury.

• Prolonged latency: Reflects delayed nerve impulse transmission due to compression or disease.

These findings help pinpoint the location, type, and severity of nerve damage, guiding accurate treatment planning.

Preparation for the Test

• No fasting or special preparation is usually required.

• Avoid applying lotions, creams, or oils on the day of the test (they interfere with electrode contact).

• Inform your doctor about any implanted devices (pacemaker) or medications that may affect nerve function.

• Wear loose-fitting clothing to allow easy access to the limbs being tested.

Combined Testing

In many cases, the NCV test is performed alongside an Electromyography (EMG) test, which evaluates the electrical activity of muscles. Together, they provide a comprehensive assessment of the nerve-muscle connection, crucial for diagnosing complex neuromuscular disorders.

Advantages of NCV Testing

• Accurate and objective assessment of peripheral nerve function

• Early detection of nerve damage before significant symptoms appear

• Helps differentiate between nerve and muscle disorders

• Guides treatment and monitors recovery progress

• Non-invasive, safe, and well-tolerated by patients of all ages

Conditions Commonly Evaluated with NCV

• Peripheral Neuropathy

• Carpal Tunnel Syndrome

• Cubital Tunnel Syndrome

• Radiculopathy (Cervical or Lumbar)

• Guillain-Barré Syndrome (GBS)

• Brachial Plexopathy

• Sciatic Nerve Injury

• Diabetic Neuropathy

Our NCV Testing Facilities

• Advanced digital neurodiagnostic equipment for precise results

• Highly trained neurophysiologists and technicians ensuring comfort and accuracy

• Integration with EMG and other neurological tests for comprehensive diagnosis

• Clean, comfortable, and fully monitored testing environment

Goals of NCV Testing

Our objectives are to:

• Detect and localize nerve damage accurately

• Differentiate between peripheral nerve, muscle, or spinal disorders

• Guide effective medical and rehabilitative treatment plans

• Monitor disease progression and nerve recovery over time