Nerve conduction velocity

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Nerve conduction test

NCV

NCV is related to the diameter of the nerve and the normal degree of myelination (the presence of a myelin sheath on the axon) of the nerve. Newborn infants have values that are approximately half that of adults, and adult values are normally reached by age 3 - 4.

Most often, abnormal results are caused by some sort of neuropathy (nerve damage or destruction) including:

• Demyelination (destruction of the myelin sheath)
• Conduction block (the impulse is blocked somewhere along the nerve pathway)
• Axonopathy (damage to the nerve axon)

• Alcoholic neuropathy
• Diabetic neuropathy
• Nerve effects of uremia (from kidney failure)
• Traumatic injury to a nerve
• Guillain-Barre syndrome
• Diphtheria
• Carpal tunnel syndrome
• Brachial plexopathy
• Charcot-Marie-Tooth disease (hereditary)
• Chronic inflammatory polyneuropathy
• Common peroneal nerve dysfunction
• Distal median nerve dysfunction
• Femoral nerve dysfunction
• Friedreich's ataxia
• General paresis
• Lambert-Eaton Syndrome
• Mononeuritis multiplex
• Primary amyloid
• Radial nerve dysfunction
• Sciatic nerve dysfunction
• Secondary systemic amyloid
• Sensorimotor polyneuropathy
• Tibial nerve dysfunction
• Ulnar nerve dysfunction

Review Date: 04/28/2005
Reviewed By: Chitra R. Uppaluri, M.D., Clinical Assistant Professor of Medicine, Saint Louis University, St. Louis, MO. Review provided by VeriMed Healthcare Network.