ELECTROMYOGRAPHY/NERVE CONDUCTION STUDY

 

An EMG/NCS is a specialized electrodiagnostic study often ordered for patients experiencing:

• Back or Neck Pain

• Numbness or Tingling

• Weakness or Muscle Cramping in the arms, legs, hands, or feet.

The primary purpose of these studies is to localize the exact origin of your symptoms—whether it's a pinched nerve in the spine, a problem with a muscle, or a nerve issue in your extremity (like Carpal Tunnel Syndrome). This accuracy is critical for developing the right, targeted treatment plan.

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What is an electromyography (EMG)?

 

The EMG studies the health of your muscles and the nerves that control them.

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The Procedure: A sterile, single-use, small thin needle is inserted into several muscles to measure their electrical activity both at rest and during slight contraction. The physician interprets these electrical signals (which are also displayed visually) to determine if there are issues with the muscles or the nerve supply to those muscles. While you may feel a small pinch when the needle is inserted, only the necessary muscles are examined to reach an accurate diagnosis.

 

What is a nerve conduction study (NCS)?

 

The NCS measures how quickly and effectively your body's electrical signals are traveling along a nerve.

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The Procedure: This is performed by placing small electrodes on the skin over the nerve being tested. Small, mild electrical impulses are applied to the nerve, and the time it takes for the signal to travel is recorded. Patients experience this as a quick, mild tingling or tapping sensation. Several nerves may be tested depending on your symptoms.

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How long will the test take?

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The test usually takes approximately 30 minutes.

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How should I prepare?

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• Normal activities such as eating, driving, or exercising are acceptable before and after the tests. There are no side effects.

• Take a bath or shower prior to the test to remove oil from your skin.

• Do not use body lotion, gels, or creams on the day of the test.