Nerve conduction study

A Nerve Conduction Study (NCS), also known as a nerve conduction velocity (NCV) test, is a medical diagnostic procedure primarily used to evaluate the function of motor and sensory nerves.

Nerve conduction velocity

Overview

Nerve conduction studies are often performed alongside electromyography (EMG) to diagnose neurological disorders, particularly those related to peripheral nerves. These tests measure the speed and strength of nerve signals along these nerves and can help identify nerve damage or dysfunction.

Procedure

During a nerve conduction study, a healthcare provider applies small electrical shocks to the nerve using electrodes placed on the skin. The speed and strength of the nerve signal is then measured. The procedure is generally safe, with minimal risks.

Uses

Nerve conduction studies are used to diagnose a variety of neurological disorders, including peripheral neuropathy, carpal tunnel syndrome, and Guillain-Barré syndrome. They can also be used to evaluate the severity of nerve damage or dysfunction.

Limitations

While nerve conduction studies are a valuable diagnostic tool, they do have limitations. They may not detect all types of nerve damage, and they can sometimes produce false-positive or false-negative results.

See also

• Electromyography
• Neurology
• Neuropathy