Electrodiagnostic Procedures (EMG & Nerve Conduction Studies) at Arthritis & Sports

Electrodiagnostic testing—including electromyography (EMG) tests and nerve conduction studies (NCS)—is one of the most effective ways to evaluate how well your nerves and muscles are working. Because nerve and muscle conditions often cause symptoms that are difficult to diagnose, EMG and NCS testing can provide essential answers and help guide your treatment plan.

We are excited to offer our patients access to quality EMGs and nerve conduction studies at our Sterling location. These electrodiagnostic procedures are performed in-house by Dr. J. Austin Underwood, one of our amazing physicians at Arthritis & Sports. In addition to nerve testing, Dr. Underwood specializes in sports medicine and rehabilitation medicine.

What Are Electrodiagnostic Procedures?

Electrodiagnostic procedures such as electromyography (EMG) and nerve conduction studies (NCS) help diagnose conditions that affect muscles, nerves, or the communication between them. These tests measure the electrical signals your nerves transmit to your muscles, allowing your provider to identify abnormalities that may explain pain, weakness, or numbness.

• Nerve Conduction Study (NCS): Measures how quickly and effectively electrical signals travel down your nerves.

• Electromyography (EMG): Measures the electrical activity in muscles to determine how well they respond to nerve signals.

These tests are often performed together to give a complete picture of your nerve and muscle function.

Why Are EMG and NCS Testing Important?

Many nerve and muscle disorders cannot be identified solely through a physical exam or bloodwork. EMG and NCS testing can detect abnormal electrical activity, helping pinpoint the exact cause of your symptoms.

You may need electrodiagnostic testing if you are experiencing:

• Muscle weakness

• Tingling, numbness, or “pins and needles” sensations

• Muscle pain, cramps, spasms, or twitching

• Unexplained limb pain

• Muscle paralysis

These tests help diagnose or rule out conditions such as:

• Muscle disorders (muscular dystrophy, polymyositis)

• Peripheral nerve disorders (carpal tunnel syndrome, entrapment neuropathies)

• Neuromuscular junction disorders (myasthenia gravis)

• Motor neuron diseases (ALS)

• Nerve root injuries (herniated discs, nerve compression)

• Other neuromuscular conditions

With clear, accurate results, your provider can develop the best treatment plan for your needs.

About Nerve Conduction Studies (NCS) Purpose: A nerve conduction study measures the speed and strength of electrical signals traveling through the peripheral nervous system. During an NCS: Small electrodes are placed on the skin. Mild electrical impulses stimulate the nerves. Your provider evaluates the nerve’s response and compares it to normal values. Most patients report only a quick tingling sensation—no significant discomfort or pain.

About Electromyography (EMG Testing) Purpose: Electromyography evaluates how well your muscles respond to nerve signals. During an EMG: A tiny needle electrode is inserted into the muscle. Your provider measures electrical activity at rest and during movement. This helps determine whether a muscle or nerve dysfunction is present. You may feel slight discomfort when the needle is inserted, but the procedure is well-tolerated and provides valuable diagnostic information.

How to Prepare for EMG and NCS Testing

Preparation is simple:

• Avoid lotions or oils on the day of your test.

• Wear comfortable clothing that allows access to the affected area.

• Expect your appointment to last 30–60 minutes, depending on what is being tested.

There are no activity restrictions before or after the study, and there are no lasting side effects.

Your physician may discuss preliminary results during your visit, but because electrodiagnostic studies require detailed review, a follow-up appointment may be necessary to go over the findings, diagnosis, and treatment plan.

Precautions and Safety Considerations

Before your test, inform your provider if you:

• Take blood thinners (ex. Coumadin)

• Have a bleeding disorder such as hemophilia

• Have a pacemaker or implanted stimulator

This information helps your physician determine the safest approach to testing.

Electrodiagnostic Testing at Arthritis & Sports

Arthritis & Sports offers convenient, high-quality EMG and nerve conduction testing performed by experienced physicians in our state-of-the-art facility. Some insurance plans may require a referral from a physician or healthcare provider.

If you have a referral or need to schedule an appointment, contact us at 703-444-5000 or click here to request your electrodiagnostic evaluation.