Electrodiagnostic Study

Electrodiagnostic (EMG) Study

Your health care provider requested an Electrodiagnostic study, which commonly includes two components:

  1. EMG – Electromyogram
  2. NCS – Nerve Conduction Study

This test helps to determine if your problem affects the nerves and muscles in your body. This test is often requested when there are complaints of numbness and/or tingling, burning pain, and/or weakness.

How is the Test Performed?

During the NCS study, the physician tapes small electrodes on the skin and applies a brief electric stimulus to different portions of motor and sensory nerves. Nerve stimulation causes a tingling sensation. The physician evaluates the electrical responses of the tested nerves.

During the EMG study, the physician analyzes the electrical activity in muscles by inserting a fine pin electrode. Electrode insertion may cause mild temporary discomfort. The physician can determine whether the muscle, and the nerve supplying that muscle, is working properly by analyzing the electrical activity of muscle fibers on a video monitor and listening over a loudspeaker.

Before the Test

  • Please arrive 10 – 15 minutes early for registration
  • Bring the completed downloaded paperwork with you if you can (located under patient forms)
  • Keep the skin free of any body lotion on the day of the examination
  • Bring a list of all your medications
  • Bring copies of any X-Rays, CT-Scans, or MRIs with you if available
  • For those with implanted Deep Brain Stimulators, the unit will need to be temporarily turned off

During the Test

  • The EMG study is done while you are lying either on your back, side or abdomen
  • It takes about 30 – 60 minutes for a one to two extremity examination
  • Everything possible will be done to keep any pain or discomfort to a minimum
  • Remember, you have the right to stop the procedure at any time

After the Test

  • After the test is completed, you may carry on your normal daily routine
  • A detailed report will be sent to your referring health care provider within 5-7 days
  • Based on the results, the next step in your evaluation and/or treatment can be made