Average HD-EMG maps across subjects in the five assessed muscles: Triceps (top left), Biceps (top right), Brachioradialis (bottom left), Anconeus (bottom middle) and Pronator Teres (bottom right). Maps are displayed in dB. The color scale for biceps and triceps is presented at the top of each figure and the color scale for brachioradialis, anconeus and pronator teres is presented at the bottom. a) Flexion at 50% MVC, b) Extension at 50% MVC, c) Supination at 50% MVC. d) Pronation at 50% MVC.