 This study investigated the effects of subcutaneous muscle displacement on surface electromyography, EMG, signals during wrist flexion. It found that as the wrist joint angle increased, so did the amount of displacement of the muscles underneath the skin. This displacement correlated positively with the amplitude of the EMG signal, suggesting that it may be beneficial for identifying subtle differences in movement. This article was authored by Lizzie Pan, Kailu, and Jamin Lee.