Análise da excitabilidade e conectividade cortical para um sistema de neurorreabilitação baseado em interface-cérebro máquina e monociclo robótico
Nenhuma Miniatura disponível
Data
2021-06-29
Autores
Cardoso, Vivianne Flávia
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal do Espírito Santo
Resumo
Recently, studies on cycling-based brain-computer interfaces (BCIs) have been standing out due to their potential for lower-limb recovery. In this scenario, the behavior of the sensory motor rhythms and the brain connectivity present themselves as source of information that can contribute to interpret the cortical effect of these technologies. This study aims to analyze how motor sensory rhythms and the cortical connectivity behave when volunteers command a reactive motor imagery (MI) BCI that provides passive pedaling feedback. Eight healthy subjects performed pedaling MI to command an Electroencephalography (EEG) based BCI with motorized pedal to receive passive movements as feedback. The EEG data were analyzed under the following four conditions: resting, MI calibration, MI online and receiving passive pedaling (online phase). Most subjects produced around Cz, corresponding to the foot area significant event-related desynchronization (ERD) patterns around Cz, when performing MI and receiving passive pedaling. The sharpest decrease was found for low β band (13 – 22 Hz). The connectivity results revealed an exchange of information between supplementary motor area (SMA) and parietal regions during MI and passive pedaling. Findings point the primary motor cortex activation for most participants and the connectivity between SMA and parietal regions during pedaling MI and passive pedaling.
Descrição
Palavras-chave
Interface cérebro-máquina , ritmos sensório-motores , conectividade do cérebro , reabilitação de membros inferiores , movimento de pedalar