Electrodiagnostic Studies (EMG)

Electromyography (EMG) is a diagnostic test that assesses the electrical activity and health of your muscles and the nerve cells (motor neurons) that control them. Motor neurons transmit electrical signals that cause muscles to contract. An EMG translates these signals into graphs or numbers to help doctors identify abnormalities.

If you are experiencing symptoms such as radiating pain, numbness, tingling, muscle cramping, or unexplained weakness in your arms or legs, your doctor may order an EMG. It helps pinpoint whether the problem is caused by a pinched nerve in the spine, a peripheral nerve issue, or a muscle disease.

An EMG is crucial for diagnosing a variety of conditions, including radiculopathy (pinched nerves in the spine), carpal tunnel syndrome, peripheral neuropathy, muscle disorders like muscular dystrophy, and conditions affecting the connection between nerves and muscles.

During an EMG, the doctor inserts very fine, sterile needle electrodes directly into the specific muscles being tested. These needles record the electrical activity of your muscles both while they are at rest and while you gently contract them. The equipment records the data for the doctor to analyze.

You may feel a slight pinch or mild discomfort when the tiny needles are inserted, similar to receiving a standard injection or acupuncture. Most patients tolerate the procedure very well. Your muscles may feel slightly sore or tender for a day or two after the test.