EMG (Electromyography) imaging is a diagnostic test used to evaluate the electrical activity of muscles. In this test, electrical activity in the muscles is measured by electrodes placed on the muscles through small needles. EMG is used to diagnose nerve damage, muscle diseases, nerve conduction disorders and other muscle and nervous system problems. There may be a brief period of mild discomfort when inserting needles into the muscles, but it is generally a safe and effective diagnostic tool. The results can help the doctor evaluate the patient's condition and create the appropriate treatment plan.