Electrodiagnostic testing consists of Nerve Conduction Studies (NCS) and / or Electromyography (EMG). These tests allow Dr. Filbey to evaluate your peripheral nerves and muscles in order to provide detailed diagnostic information which will help identify your diagnosis and optimal treatment strategy.
An electromyogram (EMG) measures the electrical activity of muscles at rest and during contraction. Nerve conduction studies measure the ability of nerves to transmit electrical signals. Using these techniques, motor and sensory function can be evaluated.
An EMG is performed in order to assess for damage in muscles, nerve or at the muscle nerve interface (neuromuscular junction). These problems may include a herniated disc (sciatica), ALS, muscle inflammation and a variety of other conditions.
A NCS is performed to assess for damage to the peripheral nervous system. This includes the nerves that travel from the spinal cord to your muscles (motor) and skin (sensation). This test is used to identify disorders such as Carpal Tunnel Syndrome or Guillain-Barre syndrome.
To prepare for the test, you should be aware of the following:
- Ensure the physician knows if you are on any blood thinners (Coumadin / Warfarin / Heparin);
- Avoid smoking and caffeine (coffee / tea / cola / chocolate) for 2-3 hours as it may alter the temperature of your extremities which can effect the test;
- Do not apply any skin moisturizer or creams on the day of your appointment as it can interfere with the electrical signals and your test results;