Electromyography (EMG) is a diagnostic technique used to assess the electrical activity of muscles. It involves placing small electrodes on the skin or inserting fine needles into the muscle to record electrical signals during muscle contraction and relaxation. This information helps doctors evaluate muscle function and diagnose conditions affecting the muscles or nerves. EMG is commonly used to investigate issues such as muscle disorders, nerve damage, and neuromuscular diseases. The results can guide treatment decisions and monitor the effectiveness of therapies. Overall, EMG is a valuable tool in understanding muscle health and function.