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标题：Modulación de las frecuencias theta y alfa por información léxico-sintáctica en una tarea de decisión léxica
其他标题：Theta and alpha frequency modulation by lexical-syntactic information during a lexical decision task
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作者：Virginia Jaichenco ; Silvano Zanutto ; Alejandro Wainselboim 等
期刊名称：Fórum Linguístico
印刷版ISSN：1984-8412
出版年度：2014
卷号：11
期号：3
页码：234-242
语种：English
出版社：Programa de Pós-Graduação em Linguística - UFSC
摘要：Estudiamos incrementos (ERS) y decrementos (ERD) relacionados con eventos en la potencia de las bandas alfa y theta asociados con una divergencia a nivel léxico-sintáctico entre prime y target durante una tarea de decisión léxica. Los participantes vieron 100 pares prime-target que compartían toda la información léxico-sintáctica (condición Igual) o diferían sólo en modo verbal (condición Diferente). Los tiempos de reacción a los targets disminuyeron en la condición Igual respecto de la Diferente, evidenciando activación del modo verbal durante la tarea. Se halló una disminución (ERS) significativa de la banda alfa en la condición Igual respecto de la Diferente 800 a 1200 ms luego de la presentación del target. Interpretamos este resultado como un indicador neurobiológico de un efecto de repetición a nivel léxico sintáctico.↓http://dx.doi.org/10.5007/1984-8412.2014v11n3p234 We studied theta and alpha event related increases (ERS) and decreases (ERD) in band power associated with a prime-target mismatch at the lexical-syntactic level during a lexical decision task. Participants saw 100 prime-target pairs that shared all lexical- syntactic information (Same condition) or differed only in verbal mode (Different condition). Reaction times decreased to targets of the Same compared to the Different group showing activation of verbal mode during the task. A significantly greater alpha ERD was obtained in the Same compared to the Different condition from 800 to 1200 ms after target presentation. We interpret this result as a neurobiological indicator of a repetition effect at the lexical-syntactic level.
其他摘要：http://dx.doi.org/10.5007/1984-8412.2014v11n3p234 We studied theta and alpha event related increases (ERS) and decreases (ERD) in band power associated with a prime-target mismatch at the lexical-syntactic level during a lexical decision task. Participants saw 100 prime-target pairs that shared all lexical- syntactic information (Same condition) or differed only in verbal mode (Different condition). Reaction times decreased to targets of the Same compared to the Different group showing activation of verbal mode during the task. A significantly greater alpha ERD was obtained in the Same compared to the Different condition from 800 to 1200 ms after target presentation. We interpret this result as a neurobiological indicator of a repetition effect at the lexical-syntactic level.
关键词：Decisión léxica; modo verbal; análisis de frecuencia; desincronización alfa.;Linguistics; Psycholinguistics;Lexical decision task; Verbal mode; Time-frequency analysis; Alpha desynchronization
其他关键词：Linguistics; Psycholinguistics;Lexical decision task; Verbal mode; Time-frequency analysis; Alpha desynchronization