Final answer:
Surface Electromyography (sEMG) captures muscle movement using electrodes attached to the skin, recording electrical activity from the muscles responsible for movement and expressions.
Step-by-step explanation:
Surface Electromyography (sEMG) muscle movement is captured by electrodes attached to the skin. This non-invasive technique records the electrical activity produced by skeletal muscles. The electrodes detect the electric potential generated by muscle cells when they are electrically or neurologically activated. During sEMG, these electrodes are adhered to the skin overlying a muscle to capture the signal. When muscles contract, particularly those that are responsible for facial expressions, the skin moves due to the interconnectedness of muscle fibers, connective tissue, and the dermis. sEMG can capture this activity to analyze muscle function and health.