Analysis of Spasticity Patient by Using sEMG to detect Fatigue Level During Rehabilitation

Abstract

Spasticity is a feature of altered skeletal muscle performance with the constraint of tendon reflex activity. The level of fatigue in spastic patients is difficult to be measured without a high-end measurement system. This work aims to evaluate the effectiveness of spasticity robotic arms robot and surface Electromyogram (sEMG) on the observation and measurement of the arms-hand skill in stroke patients during rehabilitation. The result will provide an overview of criteria and conditions for the implementation of the technology in clinical practice. This study assesses the fatigue level among spasticity patients based on the localized muscle voluntary of the patient measured using the spasticity robotic arms (SRA) and Joint Analysis of EMG Spectrum and Amplitude (JASA). The data signal was changed to spectrum and medium frequency to evaluate the fatigue where the non-implant surface electromyogram was recorded in each motor unit in real-time. The analysis JASA method able to shows the level of fatigue in a multi-degree range of motion. The sampling data signal was integrated with therobotic therapy to overcome the over-exercise or lack of training during rehabilitation. The five axes of SRA can assist the therapy to perform in multi-degree rotation with the robust flexion-extension and abduction-adduction rotations. The accuracy between RSA and LSA is 0.003 ± 0.0910 of amplitude frequency against ROM. Further investigation in Medium Frequency (MDF) is 32.81 ± 45.341 revolution between RSA and LSA is 93.9% accuracy. The effect between RSA and LSA kinematic ROM is 0.6875 ± 9.0401accuracy in 95% between each assessment in MDF. The revolute and prismatic motion was able to overcome the difficulty of spasticity patient range of motion because of stroke. The Surface EMG for non-invasive assessment of muscles (SENIAM) assessment Fugl-Meyer Assessment (FMA) is used to guide the active-passive assisted motion. The fatigue detection method was evaluated based on eight male and eight female subjects. The process of the exercise made the patient fatigue because due to the muscle unable to carry the burden of the force from the SRA robot in 95% cases for RSA and 75% in LSA. The success of work proves the JASA method and SRA robot therapy able to assist to determine the level of fatigue among spasticity patients.