Electromyography (EMG)

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Electromyography (EMG) measures and records the electrical activity of a muscle. The test can record a muscle's electrical activity at rest or during a muscle contraction.

Most EMG studies include nerve conduction studies and the EMG test.  In many cases, this test looks for evidence of nerve damage, diseases of the nerve and/or muscle or disorders of the neuromuscular junction (where the nerve and muscle connect). 

We use EMG most often to:

  • 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 disorder