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EMG/NCS (Electromyography Nerve Conduction Tests)EMG/NCS or Electromyography and Nerve Conduction tests are used to learn more about the health of peripheral nerves. An electromyogram (EMG) measures the electrical impulses of muscles at rest and during contraction. During this portion of the test, the doctor uses needles to test the muscles and record electrical activity in various muscles of the legs or arms. If a muscle doesn't receive adequate signals from a damaged nerve, it broadcasts signals, which shows the muscle is "confused". Nerve conduction studies (NCS), which measure nerve conduction velocity, determine how well individual nerves can transmit electrical signals. Nerves control the muscles in the body using electrical impulses, and these impulses make the muscles react in specific ways. Nerve and muscle disorders cause the muscles to react in abnormal ways. During this portion of the test, electrodes, much like EKG patches, are placed along the known course of the nerve. The nerve is stimulated with a little electrical current and should transmit the signal along it's course. A healthy nerve will transmit the signal faster and stronger than a damaged nerve. Measuring the electrical activity in muscles and nerves can help detect the presence, location, and extent of diseases or damage to muscle tissue or nerves. In the case of nerve injury, the actual site of nerve damage can often be located. EMG and nerve conduction studies are usually done together to provide more comprehensive information. Your physician will then correlate this information with other tests and clinical information to formulate your treatment plan. For more information, speak to your physician or email us at info@nhneurospine.com. As you read this information, keep in mind that all treatment and outcome results are specific to the individual. Only your physician can provide you with a detailed list of your specific indications, precautions, potential adverse events, and other important medical information. |
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