Electromyography Sensing Circuit for Detection of Neuromuscular Activity

This research is focused on developing an EMG circuit for detecting electromyography (EMG) signals from muscles, utilizing self-adhesive surface electrodes that are applied to capture signals from skeletal muscles. This technology is essential for understanding neuromuscular function. Two of the electrodes are placed on the flexor carpi radialis and the flexor carpi ulnaris muscles. The third electrode is placed on the Humeroradial joint as a reference. The captured signals undergo a series of processing stages, including amplification, filtering, and rectification. Due to the low amplitude of myoelectric signals (ranging from microvolts to millivolts), an instrumentation amplifier is crucial for enhancing signal strength and minimizing noise interference during data acquisition. The output signal obtained through these stages demonstrates improved quality and reliability. Current EMG devices face several challenges, including high costs, slow response times susceptibility to noise, limited amplitude sensitivity, and bulkiness. This paper proposes a compact and affordable EMG sensor that offers a promising solution for both clinical and research applications, making EMG technology more accessible and effective.