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Previous issue date: 2016-01-29 / Introdu??o: A ativa??o cerebral ? caracterizada como a propaga??o de impulsos el?tricos que promovem integra??o funcional do c?rebro. Na atualidade, uma das t?cnicas que tem permitido o monitoramento da atividade cerebral ? a eletroencefalografia a partir de interfaces n?o-invasivas e wireless. Estudos envolvendo EEG t?m investigado a rela??o entre altera??es nos padr?es de ativa??o cerebral e mudan?as no comportamento do indiv?duo. No entanto, pouco se sabe acerca do comportamento da ativa??o cerebral durante tarefas motoras e de que forma esta ativa??o ? caracterizada em ambientes virtuais ou reais.Objetivo: Investigar o comportamento do potencial de ativa??o das ondas theta, alpha, beta e gamma de adultos jovens saud?veis durante uma tarefa motora para membros inferiores em um ambiente virtual e em um ambiente real. Metodologia: Estudo cross-over, no qual 10 jovens saud?veis foram submetidos a uma avalia??o eletroencefalogr?fica durante a execu??o de tarefa de subir e descer um degrau no ambiente virtual (jogo basic step do Nintendo Wii) e em ambiente real, ambas com dura??o de 1 minuto. Os dados foram analisados atrav?s dos testes de Wilcoxon e o teste t?Student de amostras dependentes.Resultados: Descritivamente, a atividade de theta e alpha foi maior em ambiente real e a atividade de beta e gamma foi maior em ambiente virtual. O ambiente virtual promoveu maior ativa??o do hemisf?rio direito e de canais ?ntero-frontais bilateralmente. Al?m disso, na frequ?ncia theta, a regi?o occipital direita foi mais ativada em ambiente real do que virtual (p<0,05). Conclus?o: O comportamento do potencial de ativa??o das ondas theta, alpha, beta e gamma observado durante a execu??o de uma tarefa motora apresenta-se de forma vari?vel em fun??o do ambiente que o indiv?duo est? sendo exposto - real ou virtual. Dessa forma, ressalta-se a implementa??o de estudos futuros que promovam embasamento para tomada de decis?o cl?nica de forma que a escolha do ambiente terap?utico (real ou virtual) seja de acordo com as ?reas cerebrais que se objetiva ativar. / Introduction: Brain activity is defined as the propagation of electrical impulses in order to promote a functional integration of the brain. Electroencephalography is one of the techniques that allows brain activity?s monitoring by using non-invasive and wireless interfaces. Studies involving EEG have investigated the relationship between changes in patterns of brain activity and in individual behavior. However, knowledge about brain activity during motor tasks and how this activity is characterized in virtual or real environments is still unclear. Objective: Compare theta, alpha, beta and gamma power in healthy young adults during a lower limb motor task performed in a virtual and real environment. Methodology: Cross-over study in which 10 healthy young adults were subjected to an EEG assessment while performing a one-minute task consisted of going up and down a step in a virtual environment (performed by the virtual game ?Basic step?) and real environment. Wilcoxon and t'Student tests were executed to analyze data. Results: Descriptively, theta and alpha power were higher in real environment while beta and gamma power were higher in virtual environment. Virtual environment caused greater activation of the right hemisphere and anterior-frontal channels bilaterally. Furthermore, in theta frequency, the right occipital region?s activity in real environment was higher than in virtual environment (p <0.05). Conclusion: Theta, alpha, beta and gamma power observed while performing a motor task present variation according to environment in which the individual is being exposed - real or virtual. Thus, we emphasize the implementation of future studies in order to promote basis for clinical decision-making so that the choice of the therapeutic environment (real or virtual) would be according to the brain areas that are in need for activation.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/21508 |
| Date | 29 January 2016 |
| Creators | Pacheco, Thaiana Barbosa Ferreira |
| Contributors | 00847101444, Rocha, Kliger Kissinger Fernandes, 79204724404, Campos, Tania Fernandes, 60336641400, Cavalcanti, Fabricia Azevedo da Costa |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM FISIOTERAPIA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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