Differential cortical responses in second language learners to different vowel contrasts
2004
Near-infrared spectroscopy was used to measure hemodynamic responses in Korean subjects learning Japanese as a second-language to Japanese phonemic contrasts that are either phonologically distinctive or non-distinctive in their ¢rst-language. These results were compared with those of Japanese native listeners reported previously. Unlike the results observed in the Japanese subjects, the Korean subjects did not show category-speci¢c neural responses to a durational contrast that is non-distinctive in their ¢rst-language. The /a-e/ contrast elicited the larger response in the left auditory area, consistent with the results of the Japanese. These phoneme-dependent responses imply that the neuronal networks subserving the ¢rst and second-languages are either shared or exclusive according to the mutual relationship between the phonemic properties of the ¢rst and second-languages. NeuroReport 15:899^903 � c 2004 Lippincott Williams & Wilkins.
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