Low-Cost Limb Flexion Assessment: Integrating Muscle Stimulation and Electrogoniometry in Rehabilitation

This paper presents a wearable and low-cost functional electrical stimulation (FES) system designed to assess and treat pathologies affecting movement by quantifying range of motion (ROM) parameters. The system incorporates an electrogoniometer, a device dedicated to measuring joint angles, to accurately assess ROM under static and dynamic conditions. The electrogoniometer has the dual purpose of detecting motion and activating the FES system to administer electrical stimulation. Real-time monitoring of ROM provides a comprehensive understanding of the impact of pathology and the health status of joint flexibility, facilitating targeted and individualized treatment strategies. This paper focuses primarily on validating the electrogoniometric component of the system, emphasizing the accuracy of ROM measurements in static and dynamic scenarios. The results presented in the article demonstrate the system's ability to provide accurate ROM measurements, thus offering preliminary validation for the proposed motion monitoring system. The wearable, low-cost FES system with an integrated electrogoniometer represents a promising avenue for addressing movement-related conditions. The precise measurement of ROM, combined with the dynamic application of FES, has the potential to improve treatment outcomes and quality of life for people struggling with conditions that affect joint flexibility and movement. Validation of the electrogoniometric component is a key step for further development of the system.