Electromyography (EMG)

EMG is a technique for evaluating and recording the electrical activity produced by your muscles when they are at rest and when they are being used.

Who needs needle EMG test?

The test is sometimes used as a part of nerve conduction studies to detect abnormalities in nerves and muscles.

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.
Other precautions

Tell the neurophysiology lab personnel if you:

  • Take blood-thinning medications.
  • Have a blood-clotting disorder.
What can you expect?

During EMG, a small needle electrode inserted directly into the muscle to record the electrical activity. The needle electrode may cause discomfort or pain that usually ends shortly after it is removed.

After the tests
  • You can do your normal activities after the tests.
Test Duration

EMG test is done as a part of the nerve conduction studies. The tests usually take 15 to 60 minutes.

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