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EMG Testing

Electromyography (EMG)/Nerve Conduction Study (NCS) These tests (also called Electrodiagnosis) are used to evaluate conditions causing numbness, tingling, pain, weakness, or muscle cramping. We perform two main types of electrodiagnostic testing: nerve conduction studies (NCS) and electromyography (EMG). During NCS, a small electrical stimulus (brief, controlled shock) is applied along a nerve and a recording is made of how the nerve and/or muscle responds. The nerve stimulation produces a quick electrical feeling and may cause muscle contractions. An EMG is performed by inserting a thin needle electrode into the muscles, one at a time. Although the needle is small, pricking and cramping may be felt at times during the test. The tests typically take 30 to 90 minutes. You can do normal activities before and after taking the tests. If you ordinarily take pain-relieving medicine, it is all right to use it on the day of the test: it will not interfere with test results. Let the examining doctor know if you are taking aspirin or blood thinners (like Coumadin®). It is best not to use lotions on the area to be tested that day. Cell phones need to be turned off in the ...

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