An electromyogram (EMG) measures the electrical activity of
your muscles when you are not using them (at rest) and when you tighten them
Nerve conduction studies (NCS) measure how well and how fast the nerves can send electrical
EMG and nerve conduction studies are often done
together. If they are done together, the nerve conduction studies are done
before the EMG.
You may need an EMG to find diseases that
damage your muscles or nerves or to find why you cannot move your muscles
(paralysis), why they feel weak, or why they twitch.
You may need nerve conduction studies to find damage to the
nerves that lead from the brain and spinal cord to the rest of the body
(peripheral nervous system). Nerve conduction studies are often used to help
find nerve disorders, such as carpal tunnel syndrome.
You lie on a table or bed or sit in a reclining chair so
your muscles are relaxed.
For an EMG:
For nerve conduction studies:
Watch closely for changes in your health, and be
sure to contact your doctor or nurse call line if:
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and
call your doctor or nurse call line if you are having problems. It's also a good idea to keep a
list of the medicines you take. Ask your doctor when you can expect to have
your test results.
Go to http://www.healthwise.net/ed
Enter W484 in the search box to learn more about "Electromyogram (EMG) and Nerve Conduction Studies: About These Tests."
Current as of:
May 6, 2016
Adam Husney, MD - Family Medicine
& E. Gregory Thompson, MD - Internal Medicine & Karin M. Lindholm, DO - Neurology
© 2006-2016 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Care instructions adapted under license by your healthcare professional. If you have questions about a medical condition or this instruction, always ask your healthcare professional. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.