EMG Frequently Asked Questions

Nerve Conduction Studies (NCS) and Electromyography (EMG) are diagnostic tests used to assess the function of nerves and muscles. NCS measures the speed and strength of electrical signals as they travel along nerves, while EMG records the electrical activity produced by muscles.

Your healthcare provider may recommend NCS and EMG if you are experiencing symptoms such as muscle weakness, numbness, tingling, or pain. These tests can help diagnose conditions such as carpal tunnel syndrome, peripheral neuropathy, muscle disorders, and nerve injuries.

During NCS, small electrodes are placed on the skin over the nerves being tested. A small electric pulse is then applied to stimulate the nerve, and the response is recorded. This helps determine the speed and strength of nerve signals.

During EMG, a small, thin needle electrode is inserted into the muscle being tested. You may experience some discomfort or a sensation similar to a pinprick as the electrode is inserted. The electrical activity of the muscle is then recorded while you contract and relax it.

While NCS and EMG may cause some discomfort, they are generally well-tolerated by patients. The sensations experienced during these tests are often described as mild and temporary.

The duration of NCS and EMG tests can vary depending on the number of nerves and muscles being evaluated. Generally, these tests take between 30 minutes to an hour to complete.

NCS and EMG are considered safe procedures with minimal risks. Some patients may experience temporary soreness or bruising at the electrode insertion sites. In rare cases, there may be a slight risk of infection or bleeding at the insertion site.

You can typically eat and drink normally before NCS and EMG.

Your healthcare provider will interpret the results of your NCS and EMG and discuss them with you during a follow-up appointment. The time it takes to receive results may vary depending on the healthcare facility and the complexity of your case.

Before your NCS and EMG, it's helpful to wear comfortable clothing and avoid using any lotions or creams on your skin, as they can interfere with electrode placement. You may also want to inform your healthcare provider if you have any bleeding disorders or if you are taking any blood-thinning medications.

Yes, medications typically do not affect this test.

Yes.

This test will not impair your ability to drive.

Yes. This test will not affect your pacemaker function.