Electromyography (EMG) of the pelvic floor muscles is a valuable but challenging component of urodynamics testing. Optimal assessment relies on thoughtful selection of needle, wire, or surface patch electrodes; consistent display of EMG tracings simultaneously with pressure and flow tracings; and minimization of technical and environmental artifacts. This article reviews technical aspects of EMG, including the selection of the best electrodes for a given clinical scenario, minimization of environmental and technical artifacts, and clinical measurement during the filling cystometrogram and voiding pressure flow study.