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Neurophysiology tests include Nerve Conduction Studies (NCS), Electromyography (EMG), and Electroencephalography (EEG). These tests may be requested directly by your GP or specialist, but most commonly following a Neurologist’s assessment.
Nerve conduction studies (NCS) and electromyography (EMG) assesses the peripheral nervous system and can help diagnose conditions that affect muscles and nerves. NCS and EMG are often performed together. Electroencephalography (EEG) assesses brain activity and can help diagnose seizures and epilepsy. These tests are performed and interpreted by Neurologists and specialist technicians who have completed additional training in neurophysiology.
This test evaluates how peripheral nerves function. It can be performed on a variety of nerves but is most commonly performed on nerves of the arms and the legs. The test involves placing small electrodes on the skin and stimulating the nerve with a small electrical pulse. The test is well tolerated by most patients.
This test evaluates the electrical activity of the muscle by placing a small needle within the muscle. Recordings are taken with the muscle relaxed and when the muscle is tensed. It takes a few minutes for each muscle. There is a mild scratch as the needle is inserted, however the test is well tolerated by most patients.
This test evaluates the electrical activity in the brain by placing small electrodes on the surface of the scalp. It does not require shaving any hair. You may be asked to be sleep deprived for your EEG. This increases the chance of finding relevant changes. During the recording you may be asked to hyperventilate (breathe fast) and a flashing light may be activated. There will also be a chance for you to relax and perhaps sleep.
Important information:
Please try to keep hands and feet warm prior to nerve conduction study tests. This may mean wearing gloves. Try to wear comfortable, loose fitting clothing so arms and legs can be accessed. Avoid using any creams or moisturisers on the day of the test. Please bring a list of your medications and tell the doctor if you are taking any anticoagulant medications (blood thinners).