Nerve Conduction (NC) - Electromyography (EMG)

What is it?

• This is a test to see how well your nerves send signals to your muscles and skin.
• Nerves act like cables carrying messages between your brain and body.
• The test measures:
  1. Speed of the signal.
  2. Strength of the signal.
• The nerve conduction part does not require surgery or needles.
• The EMG part may use a small, thin needle to check muscle activity.

Before the procedure

• Take a bath or shower before your appointment.
• Wear loose and comfortable clothing.
• Do not put cream, lotion, or perfume on your skin — it can affect the results.
• Tell your doctor if you have:
  1. A pacemaker or other implanted medical device.
  2. Blood thinner medicines or pyridostigmine (Mestinon).

During the procedure

• You will sit or lie down.
• Small sticky pads (electrodes) will be placed on your skin over the nerves.
• The provider will send a mild electrical pulse to the nerve.
• The electrodes record how fast and strong the signal travels.
• This may be done on several nerves.
• If an EMG is needed:
  1. A small needle will be placed in a muscle to check its activity.

Is it painful?

• The electrical pulses may feel like:
  1. A small static shock.
  2. Mild tingling.
• The EMG needle may cause slight discomfort, but most people tolerate it well.

Duration of the examination

• 15 minutes to 1 hour, depending on how many nerves are tested.

After the procedure

• You can go back to your normal activities immediately.
• If a needle was used, you may feel mild soreness for a short time.

Frequently Asked Questions

1. Can I eat before the test?
   • Yes, unless your doctor tells you otherwise.
2. Do I need someone to come with me?
   • Not usually, but you can bring a friend or family member if you prefer.
3. Will it leave marks?
   • You might have small red spots or mild soreness where the electrodes or needles were placed. These fade quickly.
4. Is it safe?
   • Yes, the test is very safe. The electrical pulses are mild and brief.