Low-Cost 2-Channel Electromyography Telemeter using a Personal ComputerMicrophone Port

Objective: For the convenient use of electromyography devices physical rehabilitation locomotion, developed simple, low-cost 2-channel electromyography telemeter (LC-EMGT) that can be connected wirelessly personal computer (PC) microphone port.The aim of this study was to verify whether the performance of our fulfills the need for monitoring locomotion of patients rehabilitation. For this purpose, we compared the performance of our with an existing EMG device (NeuropackΣ).Methods: Muscle activity of the left and right vastus medialis were recorded when the participant repeated a standing-up movement for 10 seconds at 55-bpm speed. The EMG signal was simultaneously recorded the LCEMGT and NeuropackΣ. We compared the waveform of these EMG and their root mean squared in appearance and cross-correlation analysis. Also, we monitored the orthopedic patients’ EMG waveforms during standing-up and ascending stairs.Results: The cross-correlation analysis demonstrated an approximately 170-ms delay EMG measurement by due to the wireless signal transformation. Meanwhile, the amplitudes of the waveforms the LC-EMGT were almost equal to those of the NeuropackΣ. In addition, the LC-EMGT, we could visually monitor waveforms of the patients standing-up and stair climbing on-line using PC.Conclusion: Consequently, the was as reliable as the existing EMG device at monitoring EMG signals and is available as an EMG monitor real-time. The is cost-effective, convenient, and may be generally used various clinical and sports situations.