В четверг 17 ноября в 15:00 в конференц-зале ИВНД и НФ состоится заседание ЖК. Выступит Екатерина Смирнова по материалам статьи: Sound to Language: Different Cortical Processing for First and Second Languages in Elementary School Children as Revealed by a Large-Scale Study Using fNIRS В четверг 17 ноября в 15:00 в конференц-зале ИВНД и НФ состоится заседание ЖК. Выступит Екатерина Смирнова по материалам статьи: Sound to Language: Different Cortical Processing for First and Second Languages in Elementary School Children as Revealed by a Large-Scale Study Using fNIRS (Lisa Sugiura, Shiro Ojima, Hiroko Matsuba-Kurita, Ippeita Dan, Daisuke Tsuzuki, Takusige Katura and Hiroko Hagiwara| Cerebral Cortex, October 2011;21:2374-2393)
A large-scale study of 484 elementary school children (6-10 years performing word repetition tasks in their native language (L1-Japanese) and a second language (L2-English) was conducted using functional near-infrared spectroscopy. Three factors presumably associated with cortical activation,language(L1/L2), word frequency (high/low), and hemisphere(left/right), were investigated. L1 words elicited significantly greater brain activation than L2 words, regardless of semantic knowledge, particularly in the superior/middle temporal and inferior parietal regions (angular/supramarginal gyri). The greater L1-elicited activation in these regions suggests that they are phonological loci, reflecting processes tuned to the phonology of the native language, while phonologically unfamiliar L2 words were processed like nonword auditory stimuli. The activation was bilateral in the auditory and superior/middle temporal regions. Hemispheric asymmetrywasobserved in the inferior frontal region (rightdominant),and in the inferior parietal region with interactions: low-frequency words elicited more right-hemispheric activation (particularly in the supramarginal gyrus), while high-frequency words elicited more lefthemispheric activation (particularly in the angular gyrus). The present results reveal the strong involvement of a bilateral language network in children’s brains depending more on right-hemispheric processing while acquiring unfamiliar/low-frequency words. A right-to-left shift in laterality should occur in the inferior parietal region, as lexical knowledge increases irrespective of language.