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Electromyography: Can This Test Reveal What's Wrong with Your Nerves and Muscles?
Published: Apr 07, 2024
Electromyography (EMG) is a diagnostic procedure that assesses the health of muscles and the nerves controlling them. It's like eavesdropping on the electrical conversations between your nerves and muscles.
How EMG Works
During an EMG, a thin needle electrode is inserted into specific muscles to record their electrical activity. This activity is displayed on a screen and may also be heard through a speaker. The test can reveal whether a muscle is responding normally to nerve stimulation or if there's a problem with the muscle or the nerve supplying it.
What to Expect
An EMG can be slightly uncomfortable, but it's generally well-tolerated. You might feel a brief, sharp pain when the needle is inserted. The entire procedure usually takes 30-60 minutes. After the test, you might have some minor bruising or soreness at the needle insertion sites, but this typically resolves quickly.
When It's Used
Doctors often use EMG to diagnose conditions like carpal tunnel syndrome, pinched nerves, and muscular dystrophy. It can help distinguish between muscle disorders and nerve disorders with similar symptoms. EMG is also useful in evaluating unexplained muscle weakness, numbness, or tingling.
Frequently Asked Questions
It can cause brief discomfort but isn't usually described as painful.
Risks are minimal but may include minor bleeding or infection.
Avoid using lotions or oils on your skin before the test.
Key Takeaways
EMG is a valuable tool for diagnosing nerve and muscle problems, providing insights that other tests can't.
References
- Mayo Clinic. Electromyography (EMG).
- American Association of Neuromuscular & Electrodiagnostic Medicine. What is EMG?
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic. Always discuss health information with your healthcare provider.
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