Hemispheric differences over frontal theta-band power discriminate between stimulus- versus memory-driven saccadic eye movement

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art_VELASQUES_Hemispheric_differences_over_frontal_thetaband_power_discriminate_between_2011.PDF (431.07 KB)
Citações na Scopus
6
Tipo de produção
article
Data de publicação
2011
DOI
Scopus
Web of Science
PubMed
Título da Revista
ISSN da Revista
Título do Volume
Editora
ELSEVIER IRELAND LTD
Autores
VELASQUES, Bruna
MACHADO, Sergio
PAES, Flavia
BITTENCOURT, Juliana
DOMINGUES, Clayton Amaral
SALLES, Jose I.
CAGY, Mauricio
PIEDADE, Roberto
ARIAS-CARRION, Oscar
Citação
NEUROSCIENCE LETTERS, v.504, n.3, p.204-208, 2011
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
Although several electrophysiological studies have demonstrated the role of theta band during the execution of different visuospatial attention tasks, this study is the first to directly investigate the role of theta power during the planning, execution and cognitive control of saccadic eye movements (SEMs). The current study aims at addressing this issue by investigating absolute theta power over the frontal cortex during the execution of random and fixed SEMs. Twelve healthy volunteers, performed two tasks involving different conditions in the planning, execution and cognitive control of SEMs while their brain activity pattern was recorded using quantitative electroencephalography. We found an interaction between SEM condition and electrode (F3, F4, Fz), and a main effect of time point and electrode. Our key finding revealed that the stimulus presentation induces different patterns over frontal theta power increase between the left and right hemisphere. We conclude that right and left frontal regions are an important factor to discriminate between memory- versus stimulus-driven SEMs, and speculate on their different contributions to visuospatial attention.
Palavras-chave
Absolute theta power, Saccadic eye movement, Attention process, qEEG, Sensorimotor integration
URI
https://observatorio.fm.usp.br/handle/OPI/23720
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Coleções
Artigos e Materiais de Revistas Científicas - HC/ICHC