During the electromyography (EMG) examination, the doctor inserts a small needle into the muscle to record the electrical activity of the muscle (pain medicine cannot be given for this test). This test can help determine if there are any abnormalities in the muscle or the nerve going to it. The type of illness or symptoms you have will determine how many muscles and nerves need to be tested.
Small electric pulses are applied to the nerve at different sites along the nerve and recorded. The electric pulses cause a brief, mild tingling feeling. There are no side effects from this test.
Some patients with dystonia may be given a Botox Injection to help the muscles relax.