This video explains the steps of an EMG/NCS test.

EMG & Nerve Conduction Studies

Electromyography (EMG) and Nerve Conduction Studies (NCS) are diagnostic tests that evaluate the health of your muscles and the nerves controlling them. These procedures help identify nerve damage, muscle disorders, or other conditions affecting nerve and muscle function.

What are EMG and Nerve Testing?

  • Electromyography (EMG): Measures electrical activity in your muscles to assess their response to nerve signals.

  • Nerve Conduction Studies (NCS): Measures the speed and strength of signals traveling through your nerves.

Common diagnoses made by EMG/NCS

  • Nerve disorders like carpal tunnel syndrome or sciatica.

  • Neuromuscular conditions such as ALS or myasthenia gravis.

  • Muscle disorders like muscular dystrophy.

  • Peripheral neuropathy caused by diabetes or other conditions.

What to Expect

  1. Before the Test: Avoid lotions or creams on the day of testing. Wear loose, comfortable clothing (e.g., tank tops or shorts). Leave jewelry and watches at home.

  2. During the Test: The procedure typically lasts about 1 hour. You may experience mild discomfort during muscle or nerve stimulation.

  3. After the Test: No downtime is required; you can resume normal activities immediately. Your provider will review the results of the test at a follow up appointment.

Benefits

  • Accurate Diagnosis: Identifies the cause of nerve or muscle issues.

  • Minimally Invasive: No major risks or recovery time.

  • Comprehensive Assessment: Evaluates both nerve and muscle function.

  • Electromyography (EMG):

    • A small needle electrode is inserted into selected muscles to record electrical activity.

    • You may feel mild discomfort during the test.

    Nerve Conduction Studies (NCS):

    • Small electrodes are placed on your skin to stimulate the nerves.

    • Electrical impulses are sent, and the response is measured.

    • You may feel a brief tingling sensation during stimulation.

  • Yes, you can eat, drink, and take medications as usual.

  • Some patients experience mild discomfort from the needle or electrical impulses, but the test is well-tolerated.

  • Results are typically available within a few days and will be reviewed by your doctor.

    • If you experience unexplained muscle weakness, numbness, tingling, or pain.

    • If your doctor suspects a nerve or muscle disorder.