Introduction and Applications of Surface EMG.- Basic Concepts Concerning Fields and Potential Distributions of Stationary and Moving Point Sources.- Generation, Propagation, and Extinction of Single-Fiber and Motor Unit Action Potentials.- EMG Imaging: Geometry and Anatomy of the Electrode-Muscle System.- Features of the Single-Channel sEMG Signal.- Features of the Two-Dimensional sEMG Signal: EMG Feature Imaging.- Applications of sEMG in Dynamic Conditions, Ergonomics, Sports, and Obstetrics.