Nerve Conduction Study

What is a Nerve Conduction Study?

A Nerve Conduction Study, or NCS, is a study used to evaluate weakness, numbness, pain and symptoms such as fatigue, cramps or abnormal sensation. It measures muscle and nerve function. This test takes 30 to 60 minutes.

Let the Technologist know:

  • If you are taking blood thinning medication, such as aspirin, Plavix or Coumadin.
  • If you have a pacemaker.
  • If you are taking Myasthenia medication, you will be asked to stop taking it prior to your test.

You will be asked some health questions.

Before Your Test 

Prior to your test, shower or bathe as normal. Do not apply lotion or oils on your skin after you bathe, prior to your test. You may wear deodorant. Wear loose comfortable clothes.

During Your Test

You will lie on an exam table, and you may be asked to put on a gown.

Electrodes will be attached to your skin and a mild electrical stimulation will be given to stimulate a portion of the nerve. This response will be recorded so that the doctor can evaluate and determine if the nerve impulse is:

  • Conducting normally
  • Conducting slowly
  • Not transmitting at all, suggesting nerve damage.

After Your Test 

All electrodes will be removed. You will be able to resume all normal activity for the day. Your doctor will inform you of the results of the exam.