Mapping the Neural Dynamics of Korean–English Bilinguals With Medium Proficiency During Auditory Word Processing
Bilingualism is a worldwide phenomenon and provides an opportunity to understand how the brain represents language processing. Although many studies have investigated the neural mechanism of bilingualism, it still remain unclear how brain systems are involved in the second language processing. Here,...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2018-06-01
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| Series: | Frontiers in Psychology |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fpsyg.2018.00983/full |
| _version_ | 1819130726752190464 |
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| author | JeYoung Jung Kichun Nam Kichun Nam Hyesuk Cho Sunmi Kim |
| author_facet | JeYoung Jung Kichun Nam Kichun Nam Hyesuk Cho Sunmi Kim |
| author_sort | JeYoung Jung |
| collection | DOAJ |
| description | Bilingualism is a worldwide phenomenon and provides an opportunity to understand how the brain represents language processing. Although many studies have investigated the neural mechanism of bilingualism, it still remain unclear how brain systems are involved in the second language processing. Here, we examined the neural dynamics of bilinguals with medium proficiency during auditory word processing. Korean–English (K–E) bilinguals were recruited for the study (L1: Korean and L2: English). They performed a word comprehension task on phonological and semantic aspects by hearing words. We compared their task performance, task-induced regional activity, and functional connectivity (FC) between L1 and L2 processing. Brain activation analyses revealed that L2 evoked more widespread and stronger activation in brain regions involved in auditory word processing and the increased regional activity in L2 was prominent during phonological processing. Moreover, L2 evoked up-regulation during semantic processing was associated with L2 proficiency. FC analyses demonstrated that the intra-network connectivity showed stronger in the language network (LN), dorsal attention network (DAN), and default mode network (DMN) in L2 than L1. For the L2 phonological processing, the increased FC within the DAN was positively correlated with individuals’ L2 proficiency. Also, L2 semantic processing induced the enhanced internetwork connectivity between the LN and DMN. Our findings suggest that L2 processing in K–E bilinguals induces dynamic changes in the brain at a regional and network-level and FC analysis can disentangle the different networks involvement in L2 auditory word processing according to two key features: phonology and semantics. |
| first_indexed | 2024-12-22T09:04:12Z |
| format | Article |
| id | doaj.art-a2a522ecb2ef490c98dcb8fb0094f573 |
| institution | Directory Open Access Journal |
| issn | 1664-1078 |
| language | English |
| last_indexed | 2024-12-22T09:04:12Z |
| publishDate | 2018-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Psychology |
| spelling | doaj.art-a2a522ecb2ef490c98dcb8fb0094f5732022-12-21T18:31:38ZengFrontiers Media S.A.Frontiers in Psychology1664-10782018-06-01910.3389/fpsyg.2018.00983313163Mapping the Neural Dynamics of Korean–English Bilinguals With Medium Proficiency During Auditory Word ProcessingJeYoung Jung0Kichun Nam1Kichun Nam2Hyesuk Cho3Sunmi Kim4Neuroscience and Aphasia Research Unit, Division of Neuroscience and Experimental Psychology, School of Biological Sciences, The University of Manchester, Manchester, United KingdomDepartment of Psychology, Korea University, Seoul, South KoreaWisdom Science Center, Korea University, Seoul, South KoreaWisdom Science Center, Korea University, Seoul, South KoreaWisdom Science Center, Korea University, Seoul, South KoreaBilingualism is a worldwide phenomenon and provides an opportunity to understand how the brain represents language processing. Although many studies have investigated the neural mechanism of bilingualism, it still remain unclear how brain systems are involved in the second language processing. Here, we examined the neural dynamics of bilinguals with medium proficiency during auditory word processing. Korean–English (K–E) bilinguals were recruited for the study (L1: Korean and L2: English). They performed a word comprehension task on phonological and semantic aspects by hearing words. We compared their task performance, task-induced regional activity, and functional connectivity (FC) between L1 and L2 processing. Brain activation analyses revealed that L2 evoked more widespread and stronger activation in brain regions involved in auditory word processing and the increased regional activity in L2 was prominent during phonological processing. Moreover, L2 evoked up-regulation during semantic processing was associated with L2 proficiency. FC analyses demonstrated that the intra-network connectivity showed stronger in the language network (LN), dorsal attention network (DAN), and default mode network (DMN) in L2 than L1. For the L2 phonological processing, the increased FC within the DAN was positively correlated with individuals’ L2 proficiency. Also, L2 semantic processing induced the enhanced internetwork connectivity between the LN and DMN. Our findings suggest that L2 processing in K–E bilinguals induces dynamic changes in the brain at a regional and network-level and FC analysis can disentangle the different networks involvement in L2 auditory word processing according to two key features: phonology and semantics.https://www.frontiersin.org/article/10.3389/fpsyg.2018.00983/fullbilingualsfunctional connectivityneural plasticitydorsal attention networkdefault mode network (DMN)fMRI |
| spellingShingle | JeYoung Jung Kichun Nam Kichun Nam Hyesuk Cho Sunmi Kim Mapping the Neural Dynamics of Korean–English Bilinguals With Medium Proficiency During Auditory Word Processing Frontiers in Psychology bilinguals functional connectivity neural plasticity dorsal attention network default mode network (DMN) fMRI |
| title | Mapping the Neural Dynamics of Korean–English Bilinguals With Medium Proficiency During Auditory Word Processing |
| title_full | Mapping the Neural Dynamics of Korean–English Bilinguals With Medium Proficiency During Auditory Word Processing |
| title_fullStr | Mapping the Neural Dynamics of Korean–English Bilinguals With Medium Proficiency During Auditory Word Processing |
| title_full_unstemmed | Mapping the Neural Dynamics of Korean–English Bilinguals With Medium Proficiency During Auditory Word Processing |
| title_short | Mapping the Neural Dynamics of Korean–English Bilinguals With Medium Proficiency During Auditory Word Processing |
| title_sort | mapping the neural dynamics of korean english bilinguals with medium proficiency during auditory word processing |
| topic | bilinguals functional connectivity neural plasticity dorsal attention network default mode network (DMN) fMRI |
| url | https://www.frontiersin.org/article/10.3389/fpsyg.2018.00983/full |
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