developing portable audio-visual biofeedback system based on electromyography for rehabilitation and muscle tension control

Available rehabilitation systems require highly experienced staff to interpret a patient's muscle activity in a specialized laboratory, and have limitations such as the inability to conduct biofeedback at home. this study designed an interactive indoor electromyography (emg) biofeedback device for facilitating patients' rehabilitation. in sensing section, we used an emg sensor to recording patients’ data and in a processing section, this biofeedback device filtering recorded signals and recovering misted data. at the end, it sends feedback to patient by playing a beep sound to represent muscle tension and help you to controlling them. also, using the built-in oled screen, it is possible to read emg data and sensor information or analog voltage on the oled screen, and the oled screen starts displaying the amount of analog emg signal as well as the voltage. this device allows a person to consciously control a part of the body that they cannot normally feel as well-known sense, like kinesthesia. emg signals were obtained from 10 healthy male subjects, and the results were compared with the approved data. according to the correlation coefficient parameters, the overall similarity between the two systems was 97.48%. the proposed device has some advantage, such as small size, portable and rechargeable, low cost and user-friendly interface.