Nerve Conduction Studies (NCS)

NCS are the tests used to measure electrical activity and evaluate the function of the nerves.

Who needs Nerve conduction studies?

Your doctor may order these tests if you have signs or symptoms that may indicate a nerve or muscle disorder. Such symptoms may include:

  • Tingling
  • Numbness
  • Muscle weakness
  • Muscle pain
How do you prepare for the test?
  • Wear loose, comfortable clothing that allows easy access to the test area.
  • Make sure your skin is clean.
  • Do not use lotions or creams before the test.
  • You can do any of your normal activities, like eating, driving, and exercising, before the tests.
Other precautions

Tell the neurophysiology lab personnel if you have a pacemaker or any other electrical medical device.

What can you expect?

Small recording electrodes will be attached to the skin. The doctor will then place a stimulating electrode and give a mild and brief electrical shock to stimulate your nerve.

During nerve stimulation, you will feel a tiny electrical current that may feel like a twinge or spasm.

After the tests

There are no after-effects from the tests.

Test Duration

The tests usually take 15 to 60 minutes.

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