EMG, or electromyography, is a diagnostic procedure that measures the electrical activity of muscles. It involves placing small electrodes on the skin or inserting fine needles into the muscle to detect electrical signals generated during muscle contraction. This information helps assess the health of muscles and the nerve cells that control them. The results of an EMG can help diagnose various conditions, such as muscle disorders, nerve damage, and neuromuscular diseases. By analyzing the electrical signals, healthcare providers can determine if there are any abnormalities in muscle function or nerve transmission, aiding in effective treatment planning.