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|EMG of the Shoulder|
|Copyright © Nucleus Medical Media, Inc.|
Reasons for Test
- Aid in diagnosing the source of pain, cramping, or weakness
- Differentiate between true muscle weakness and limitations due to pain
- Determine if muscles and nerves are working properly
- Distinguish between muscle and nerve disorders
- Pain or bruising at the needle insertion site
- Infection at the needs insertion site
What to Expect
Prior to Test
- Aspirin or other non-steroidal anti-inflammatory drugs (NSAIDs)
- Blood thinners
- If you have myasthenia gravis , ask if you should take any medication before the test.
- If directed to, avoid cigarettes, coffee, tea, and soft drinks for 2-3 hours before the test.
- Take a bath or shower before the test.
- On the day before, do not use lotion or oil.
- Wear comfortable clothing. You will have to change into a hospital gown.
- Tell your doctor if you have a pacemaker or other implanted device.
Description of the Test
- Resume any medications you stopped before the test
- Resume normal activities as tolerated
How Long Will It Take?
Will It Hurt?
Call Your Doctor
- Signs of infection, including fever and chills
- Redness, swelling, increasing pain, excessive bleeding, or discharge around the needle sites
National Institutes of Health http://www.nih.gov
National Institute of Neurological Disorders and Stroke http://www.ninds.nih.gov
Health Canada http://www.hc-sc.gc.ca
Muscular Dystrophy Canada http://www.muscle.ca
Electromyography (EMG). Johns Hopkins Medicine website. Available at: http://www.hopkinsmedicine.org/healthlibrary/test%5Fprocedures/neurological/electromyography%5Femg%5F92,P07656 . Accessed July 31, 2013.
FAQ: patient information. American Association of Neuromuscular & Electrodiagnostic Medicine website. Available at: http://www.aanem.org/Education/Patient-Resources/Learn-About-an-EMG.aspx . Accessed July 31, 2013.
- Reviewer: John C. Keel, MD
- Review Date: 06/2013
- Update Date: 06/03/2013