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You are here : 3-RX.com > Medical Encyclopedia > Tests and Exams > Nerve Conduction Velocity Test: Results and Values
      Category : Health Centers > Brain and Nervous System

Nerve Conduction Velocity Test

Alternate Names : NCV, Electroneurography, ENG, Nerve Conduction Studies, Stimulation Myelographic Study

Nerve Conduction Velocity Test | Preparation & Expectations | Results and Values

What do the test results mean?

Normal results from a nerve conduction velocity test mean that there is no evidence of damage or disease in the peripheral nerve. Nerve damage or disease may still exist despite normal NCV results. This is because other healthy fibers in the same nerve may show a normal reaction time. This test is often used in conjunction with electromyography (EMG) to evaluate neuromuscular abnormalities.

Abnormal results may depend on why the nerve conduction velocity test is being performed. These results may indicate:

  • peripheral nerve injury or disease
  • carpal tunnel syndrome, a condition in which pressure on the median nerve in the wrist leads to pain or numbness in the fingers
  • poliomyelitis, a condition that affects the spinal cord
  • diabetic neuropathy, which is temporary or permanent nerve damage due to diabetes
  • herniated disc, which causes pain in the back
  • myasthenia gravis, a disease that causes extreme muscle weakness and fatigue
  • Guillain-Barre syndrome, a condition that causes nerve damage and inflammation, and muscle weakness and paralysis
  • damage to a nerve from trauma
  • nerve defects from kidney disease or damage
  • chronic inflammatory polyneuropathy, which is the simultaneous malfunction of many peripheral nerves throughout the body. It can be caused by diabetes, chronic renal failure, or severe malnutrition.
  • metachromatic leukodystrophy, a very serious condition that causes difficulty walking and difficulty controlling movements of the arms and legs

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    Nerve Conduction Velocity Test: Preparation & Expectations


    Author: Eileen McLaughlin, RN, BSN
    Reviewer: Gail Hendrickson, RN, BS

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