Protocol and system for acquisition and processing EEG and SEMG signals for lower limbs rehabilitation use / Protocolo e sistema para aquisição e processamento de sinais EEG e SEMG para uso de reabilitação de membros inferiores

Douglas Ruy Soprani da Silveira Araújo, Thomaz Rodrigues Botelho, Camila Rodrigues de Carvalho e Carvalho, Jessica Paola Souza Lima, Eduardo Rocon de Lima, Anselmo Frizera Neto, André Ferreira


Purpose: This work proposes a protocol and system for signal acquisition, synchronization and processing of as superficial electromyography (sEMG) and electroencephalography (EEG) signals. The outputs of the system can be applied in rehabilitation robotic devices and used by patients with physical disabilities. Assistive devices, as exoskeletons, can make use of physiological data as sEMG and EEG, to detect movement intentions. Methods: An integrated system was developed with sEMG and EEG electrodes, Inertial Sensors and a Processing Unit in order to perform experiments and to acquire physiological data. Each experiment was performed by ten healthy subjects and composed by 30 repetitions of extension and flexion of the knees. The goal is to analyze movement intention, muscle activation and movement onset. Results: Results showed that the proposed system and protocol are able to acquire, synchronize, process and classify the signals. Analyses about the accuracy of the classifiers showed that the interface was able to identify movement intention. Using an OR logic between the EEG and sEMG signals improved the detection accuracy of the whole system up to 92%, from approximately 80% using only sEMG signal and 60% using only EEG signal. Conclusion: The results show that the proposed protocol can be used acquire, process and improve movement intention using EEG and sEMG signals. This portable protocol can be potentially used to control devices and support the therapy of patients who need physical rehabilitation, they can benefit from robotic rehabilitation aiming at improving the efficiency of recovery.




Electroencephalography (EEG), Surface Electromyography (sEMG), Inertial Sensors (IMU), Signal Acquisition Protocol, Signal Processing, Robotic Rehabilitation.

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