Electrodiagnostic Studies (EMG/NCV)

What is it?

An EMG records and analyzes the electrical activity in your muscles. It is used to learn more about the functioning of nerves in the arms and legs. The electrodiagnostic examination consists of two main parts: a needle electrode examination and a nerve conduction study. These provide complementary information and are usually done together.

How is it done?

During an EMG, small, thin needles are placed in the muscle to record the electrical activity. When the needles are inserted, you may feel some pain and discomfort. The doctor will listen and watch a TV-like screen that broadcasts the electrical signals. You will also be able to hear the signal sounds as you move the muscle. When the needles are removed, you may experience some soreness and bruising, but this will disappear in a few days. There are no long-term side effects.

What does it diagnose?

  • Radiculopathy
  • Carpal tunnel syndrome
  • Ulnar neuropathy
  • Radial tunnel
  • Thoracic Outlet Syndrome
  • Peroneal palsy

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