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Electromyogram of Shoulder—Used in Conjunction with Nerve Conduction Study  
Electromyogram EMG

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Definition  

A nerve conduction study (NCS) is a test that measures the speed and strength of electrical activity in a nerve. The test can gather information about the structure and function of both muscle and nerve.

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Reasons for Test  

A NCS is most often done to:

  • Help diagnose the cause of pain, cramping, numbness, or weakness
  • Determine if nerves are working properly
  • Identify the difference between muscle and nerve disorders
  • Monitor if a nerve is recovering from injury
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Possible Complications  

There are no major complications associated with this test.

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What to Expect  

Prior to Test  

Before your procedure:

  • Make sure you talk to your doctor about the medications you are taking.
  • If you have myasthenia gravis, ask if you should take any medication before the test.
  • If directed to, avoid cigarettes,