Electromyography (EMG) Test

Electromyography (EMG) is a diagnostic procedure used to assess the health of muscles and the nerve cells that control them (motor neurons). It’s often used to diagnose or rule out a variety of neuromuscular disorders.

During an EMG test, small electrodes are inserted into your muscles to record the electrical activity. This activity is then displayed on a monitor, allowing a doctor to analyze how your muscles and nerves are functioning. The procedure is performed by a highly skilled AHN neurologist and the results are analyzed by a multidisciplinary team to understand your results.

When performed by a skilled and experienced professional, like those at AHN, an EMG is a highly accurate and invaluable diagnostic tool for evaluating neuromuscular disorders. It provides critical information that often cannot be obtained through other means.

AHN Neuromuscular Program

The AHN Neuromuscular Program and its highly experienced and compassionate staff are focused on providing comprehensive care for conditions that affect your nerves and muscles. We put you at the center of everything we do and work to improve your health outcomes so you can live your fullest life. As our patient, your care will focus getting the right diagnosis and treatment plan through a team-based approach to care.

Our expert staff has decades’ worth of experience in treating these conditions and are certified by both the American Board of Clinical Neurophysiology and the American Association of Electrodiagnostic Medicine. This dual certification illustrates the exceptional quality of care and dedication our staff are to performing at the highest standards of practice in clinical neurophysiology and electrodiagnostic medicine.

Why choose AHN for diagnosing conditions with an EMG test

When having an electromyography test from AHN’s Neuromuscular Program, patients can expect:

  • Specialized expertise: AHN's Neuromuscular Program has neurologists who are fellowship-trained in neuromuscular medicine. This means they have dedicated, in-depth knowledge and experience in diagnosing and treating conditions affecting muscles and nerves, including performing and interpreting EMGs.
  • Comprehensive care: Neuromuscular disorders can be complex. A specialized program often provides a multidisciplinary approach, meaning patients might have access to a team of experts beyond just the neurologist, such as physical therapists, occupational therapists, speech therapists, and pain management specialists, all working together to create a holistic treatment plan.
  • Advanced diagnostic capabilities: Beyond standard EMG, these programs often utilize the latest diagnostic tools and techniques to accurately identify the specific neuromuscular condition.
  • Integrated treatment options: Patients benefit from a range of treatment options, which could include medication management, advanced therapies, and rehabilitation services, all coordinated within one program.
  • Patient-centered approach: Specialized programs focus on providing personalized care plans tailored to the individual needs and goals of each patient.

Common conditions diagnosed by Electromyography

There are certain conditions that are best served by conducting an EMG. They often include:

What to expect during your electromyography (EMG) test

If your doctor recommends having an EMG test, this procedure usually has two parts:

  1. Nerve conduction study (NCS): This first step often includes having small, sticky electrodes placed on your skin over the nerves to be tested. A mild electrical device will be used to deliver brief, small electrical pulses to the nerve. You'll feel a quick, tingling, or shocking sensation with each pulse — any sensation will feel mild. The electrodes will record how quickly and strongly your nerves transmit these electrical signals. This helps assess nerve damage.
  2. Needle electromyography: After the NCS, a very fine, sterile needle electrode will be inserted directly into several different muscles. This part can be uncomfortable, feeling like a brief pinch or muscle cramp, but it's generally well-tolerated. You’ll be asked to slightly bend your arm or leg. The electrical activity during this contraction will be recorded and analyzed for patterns that could indicate muscle or nerve problems. The needle may be moved to several different spots within the same muscle, and then to other muscles, depending on what the doctor needs to evaluate.

Preparing for your electromyography test

Your AHN care team will give you specific instructions on how to prepare for your test, but you will provide your doctor with a complete list of all medications you are taking, especially blood thinners (anticoagulants like warfarin, Eliquis, Xarelto, Plavix, aspirin, etc.). Your doctor might advise you to temporarily stop some of these before the test to reduce the risk of bruising or bleeding, but never stop medication without explicit instructions from your doctor.

Your doctor will likely ask about any bleeding disorders, pacemakers, implanted defibrillators, or other electrical medical devices. Let them know about any allergies, especially to latex or adhesive tape.

Don't hesitate to ask your doctor or the clinic staff any questions you have about the procedure beforehand.

On the day of your test, do not apply any lotions, creams, oils, or powders to your skin, especially in the areas where the electrodes will be placed or where needles might be inserted. These products can interfere with the electrical signals and make it difficult for the electrodes to stick or for the test to be accurate.

EMG test recovery

After your electromyography test, you might experience some mild muscle soreness, tenderness, or bruising at the needle insertion sites for a day or two. However, you can usually resume your normal activities immediately after the test.

Understanding your EMG test results

The doctor who performed your EMG test will analyze the results and compile a report. Talk with your referring physician to discuss results.

EMG FAQs

Understanding an electromyography (EMG) test can help you feel more prepared and confident. These frequently asked questions offer brief answers to common concerns, so you can have a more informed conversation with your doctor about the procedure.

What is an EMG test?

An EMG is a diagnostic test that measures the electrical activity of your muscles and the nerves that control them. It helps your doctor understand how well your nerves are sending signals and how your muscles are responding.

What is EMG test used to diagnose?

An EMG test is used to diagnose various nerve and muscle disorders that can cause symptoms like numbness, tingling, weakness, or pain. This includes conditions such as pinched nerves, carpal tunnel syndrome, sciatica, and muscle diseases.

How long does an EMG take?

The length of an EMG test can vary, but it typically takes anywhere from 30 minutes to 2 hours. This depends on how many nerves and muscles need to be examined based on your symptoms.

What happens if EMG is abnormal?

If your EMG results are abnormal, it means the test has identified an issue with your nerves or muscles. Your doctor will discuss these findings with you in detail, explain what they mean for your specific condition, and outline the next steps for treatment or further evaluation.

Contact us

To schedule an appointment or learn more about AHN neuroscience services, call 412-359-6200.

If you're an existing patient, you can also call (412) DOCTORS 412-362-8677 in Pittsburgh or request an appointment with AHN neuroscience services.