Key Technologies On Rehabilitation Via Neuromuscular Electrical Stimulation And Gait Analysis For Motor Dysfunction

Motor dysfunction refers to the motor impairment or disorders of human.It decreases the life quality of the patients and their families.Neuromuscular Electrical Stimulation,which helps speed up the patients' recovery,is the focus of rehabilitation engineering.This thesis deeply studied the efficacy of Neuromuscular Electrical Stimulation and the estimation of gait stability for motor rehabilitation based on motor dysfunction caused by musculoskeletal and neural problems.Firstly,this study analyzed the relationship between knee parameters and knee medial force of 16 subjects during different tasks based on linear regression and lowerlimb musculoskeletal modelling.The result showed that knee adduction moment,knee flexion moment and knee adduction angle were the significant predictors of knee medial force,and provided a basis of biomechanical parameter estimation for knee osteoarthritis rehabilitation.Secondly,this study first proposed a simulation method for Neuromuscular Electrical Stimulation based on a musculoskeletal model of the lower limb called Freebody,and verified that the electrical stimulation can decrease knee medial force with data from 10 subjects.Additionally,the significant variation of knee adduction moment and ankle adduction angle demonstrated that the electrical stimulation decreased knee medial force.The result provided a novel method for the rehabilitation of medial knee osteoarthritis.Thirdly,this study calculated EEG-EMG coherence before and after short-term Neuromuscular Electrical Stimulation,in order to explore the influence of electrical stimulation on the coupling between neural and musculoskeletal systems.It was found that electrical stimulation can strengthen functional connection between the brain and muscles and brain activation,and therefore the study provided theoretical support for the use of electrical stimulation in stroke.Finally,this study proposed a method to calculate the center of mass-foot contact point inclination angle,which made up for the disadvantages of traditional stability estimation.This method verified the accuracy of stability estimation through gait data with different curvatures and step lengths,and provided new methods for stability estimation during the rehatilitation of patients with motor dysfunction.In summary,this thesis revealed the influence of Neuromuscular Electrical Stimulation on knee medial force and EEG-EMG coherence,and proposed a novel stability estimation method.This study is hoped to provide theoretical analysis and technical methods for the rehabilitation of motor dysfunction.