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http://dx.doi.org/10.5762/KAIS.2015.16.3.1707

Neural bases underlying Native or Foreign word production, and Language switching  

Kim, Choong-Myung (Division of Language, Speech and Psychological Therapy, Gwangju University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.16, no.3, 2015 , pp. 1707-1714 More about this Journal
Abstract
The neural bases underlying within or between-language picture naming was investigated by using event-related fMRI. The present suudy explorered the following two goals: The first is to compare cortical activation areas relevant to naming process in native and foreign language, and to decide whether the activation pattern of the foreign word will be the same as native words or not. The next is to find the cerebral areas involved only in alternating language switching between native and foreign language condition. Differential activation patterns were observed for language switching against one-language. Both naming tasks all activated the left inferior frontal gyrus (LIFG) as expected. However the differences in naming between languages were reflected in the activation amount of the LIFG, namely more activation in naming the native language than the foreign language. Especially, naming of the foreign word from English showed the similar area and size in activation with native language suggesting that the process of borrowed noun resembles that of native common noun. And the language switching between languages newly activated the right middle frontal gyrus as well as the left inferior frontal areas. The right middle frontal gyrus engagement in switching conditions obviously identified that right hemisphere is recruited in code switching possibly with respect to meta-cognition controlling language index at a subconscious level.
Keywords
language switching; foreign word; right hemisphere engagement; event-realted fMRI;
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