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Northland DHB Neurology

Public Service, Neurology

Nerve Conduction Studies (NCS)

NCS are tests of the speed of conduction of impulses through a nerve. A doctor performs the tests, sometimes with a technician.

The nerve is stimulated, with electrodes placed on the skin. One electrode stimulates the nerve with a mild electrical impulse and the other electrodes record the resulting electrical activity.

The impulse will feel like a small electric shock. Depending on how strong the stimulus is you will feel it to varying degrees and it will be uncomfortable for you. You should feel no pain once the test is finished.
This test is used to diagnose nerve damage or destruction. Information from the test can tell the doctor what part of the nerve is damaged and give an idea as to the disease causing the damage. There are no risks from this test.

This page was last updated at 2:14PM on May 10, 2021.