Therefore, your physician may advise you to stop these medicines 3 to 6 days prior to your procedure. Before the procedureĬertain medications that act on the nervous system can cause abnormal test results. This test can be used to diagnose neurological disorders, such as carpal tunnel syndrome or Guillain-Barré syndrome. Nerve Conduction Studies (NCS) are used to detect damage or injury to the peripheral nervous system (PNS), which consists of the extracranial nerves and spinal cord. An EMG can also be used to evaluate the cause of weakness, paralysis, and muscle twitching. IndicationsĮMG testing can be used for the diagnosis of a variety of disorders that damage muscle tissue, nerves, or the junctions between nerve and muscle such as a herniated disc, amyotrophic lateral sclerosis (ALS), or myasthenia gravis (MG). Your doctor may arrive at a diagnosis based on the results of the EMG along with information from your medical history, physical and neurological examinations, and results from other tests. Nerve conduction studies measure the conductivity of the nerves. An EMG is designed to record the electrical activity produced by the muscles, during rest and contraction. Diseases affecting the muscles and nerves can result in abnormal electrical activity.Įlectromyography (EMG) and Nerve conduction studies are diagnostic tests used to detect nerve and muscle disorders and to evaluate the functioning of your nerves and muscles. Nerves use electrical impulses to coordinate muscle movement in our bodies.

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