Research On Upper And Lower Limb Rehabilitation System Based On Brain-computer Interface Technology

Stroke is the most common cranial nervous system disease,which is a cerebrovascular disease caused by damage or loss of nerves in the brain.Stroke patients are often accompanied by symptoms such as slurred speech,aphasia,numbness,weakness,or difficulty in movement.In severe cases,they may also cause hemiplegia and death.Motor dysfunction is one of the common clinical symptoms after the onset of stroke patients.Because of the loss of physical mobility,they are unable to take care of themselves,which brings great troubles to the lives of patients and the care of their families.For patients with limb motor dysfunction,traditional exercise therapy mainly relies on artificial help to move the injured limbs,which has a better protective effect on the patients' muscle atrophy and neurodegeneration caused by prolonged paralysis.However,this method requires a lot of manpower and financial resources,and the effectiveness of rehabilitation can only be evaluated subjectively based on the experience of doctors,and lacks scientific and systematic evaluation.The emergence of rehabilitation equipment solves the problem of the lack of physicians.The use of mechanical external forces instead of artificial forces can help patients complete limb rehabilitation training more quickly and accurately.However,this passive rehabilitation exercise has a lower effect on the damaged brain nerves of the patient and restores it.The cycle is long.This article proposes a rehabilitation system for upper and lower limbs based on brain-computer interface technology,which effectively combines the advantages of traditional mechanical movement therapy and neurotherapy,especially the design of the brain-controlled rehabilitation training system,which enables patients to repair them while recovering.The damaged central nervous system rebuilds nerve pathways in the body and plays an important role in the recovery of brain nerve function.The main research contents of this thesis are as follows:1.Introduced the research background and purpose of this article,including the introduction of the current research status of rehabilitation training system,explaination of the theoretical significance and promotion value of rehabilitation system on post-stroke limb motor dysfunction2.Introduced the basic knowledge of rehabilitation medicine theory,analyzed the research of brain plasticity,and formulated the evaluation standard of rehabilitation system.3.designed the overall framework of the proposed rehabilitation system,including system function realization,ontology structure design and optimization,control scheme selection,hardware equipment selection and procurement,human-computer interaction interface and communication design,etc.4.Developed a brain-controlled rehabilitation training system based on motor imaging BCI technology,introduced the principle and composition of the brain-computer interface,and analyzed the feasibility of the brain-controlled rehabilitation system.At the same time,using electroencephalogram(EEG)as the signal source,the four links of signal generation,acquisition,processing and output control are studied and analyzed,and the Riemann space algorithm is focused on the feature extraction and pattern classification of EEG signals.5.The feasibility of the underlying control program is simulated and verified through the controller programming software platform.The feasibility of the system is demonstrated separately from the accuracy of EEG signal classification and the rate of misoperation during the operation of the rehabilitation system.The effectiveness of the system was tested in collaboration with the Rehabilitation Department of the Affiliated Hospital of Shandong University of Traditional Chinese Medicine.Clinical experiments were conducted on patients with upper limb motor dysfunction caused by stroke,and the effectiveness of the system was finally evaluated.The rehabilitation system studied in this article has broad application prospects in the field of neurological rehabilitation.The motor imagination BCI technology mentioned in the thesis can enable patients to complete limb rehabilitation training on the basis of subjective consciousness.This spontaneous EEG signal can better repair the patient's damaged brain nerves and achieve the reconstruction of the body's neural circuit purpose.