Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Neural Switching Mechanism in the late Korean-English bilinguals by Event-Related fMRI

  • Kim, Jeong-Seok (Department of Research & Development, GE Ultrasound Korea)
  • Published : 2008.08.30
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Abstract

Functional MRI technique was used in this study for examining the language switching mechanisms between the first language (L1) and the second language (L2). Language switching mechanism is regarded as a complex task that involves an interaction between L1 and L2. The aim of study is to find out the brain activation patterns during the phonological process of reading real English words and English words written in Korean characters in a bilingual person. Korean-English bilingual subjects were examined while they covertly read four types of words native Korean words, Korean words of a foreign origin, English words written in Korean characters, and English words. The fMRI results reveal that the left hemispheric language-related regions at the brain, such as the left inferior frontal, superior temporal, and parietal cortices, have a greater response to the presentation of English words written in Korean characters than for the other types of words, in addition, a slight difference was observed in the occipital-temporal lobe. These results suggest that a change in the brain circuitry underlying the relational processes of language switching is mainly associated with general executive processing system in the left prefrontal cortex rather than with a similarity-based processing system in the occipital-temporal lobes.

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References

  1. S.E. Petersen, P.T. Fox, M.I. Posner, M. Mintun, M.E. Racichle, "Position emission tomographystudies of the cortical anatomy of single-word processing", Nature, vol. 331, pp. 585-589, 1988 https://doi.org/10.1038/331585a0
  2. D. Klein, B. Milner, R.J. Zatorre, E. Meyer, A.C. Evans, The neural substrates underlying word generation: a bilinguals functional-imaging study, Proc. Natl. Acad. Sci. U.S.A., vol. 92, pp. 2899-2903, 1995 https://doi.org/10.1073/pnas.92.7.2899
  3. K.H. Kim, N.R. Relkin, K.M. Lee, J. Hirsch, "Distinct cortical areas associated with native and second languages", Nature, vol. 388, pp. 171-174, 1997 https://doi.org/10.1038/40623
  4. M.W. Chee, E.W. Tan, T. Thiel, "Mandarin and English single word processing studied with functional magnetic imaging", J.Neurosci., vol. 19, pp. 3050-3056, 1999a https://doi.org/10.1523/JNEUROSCI.19-08-03050.1999
  5. A.E. Hernandez, A. Martinez, K. Kohnert, "In search of the language switching: an fMRI study of picture naming in Spanish- English bilinguals", Brain Lang., vol. 73, pp. 421-431, 2000 https://doi.org/10.1006/brln.1999.2278
  6. D. Klein, R.J. Zatorre, J. Chen, B. Milner, J. Crane, P. Belin, M. Bouffard, "Bilingual brain organization: A functional magnetic resonance adaptation study", NeuroImage, vol. 31, pp. 366-375, 2006 https://doi.org/10.1016/j.neuroimage.2005.12.012
  7. C.J. Price, D.W. Green, R. von Studniz, "A functional imaging study of translation and language switching", Brain, vol. 122, pp. 2221-2235, 1999 https://doi.org/10.1093/brain/122.12.2221
  8. S. Dehaene, E. Dupoux, J. Mehler, L. Cohen, E. Paulesu, D. Perani, P.F. van de Moortele, S. Lehericy, D. le Bihan, "Anatomical variability in the cortical representation of first and second language", NeuroReport, vol. 8, pp. 3809-3815, 1997 https://doi.org/10.1097/00001756-199712010-00030
  9. D. Perani, E. Paulesu, N.S. Galles, E. Dupoux, S. Dehaene, V. Bettinardi, S.F. Cappa, F. Fazio, J. Mehler, "The bilingual brain. Proficiency and age of acquisition of the second language", Brain, vol. 121, pp. 1841-1852, 1998 https://doi.org/10.1093/brain/121.10.1841
  10. J.F. Kroll, E. Stewart, "Category Interference in Switching and Picture Naming: Evidence for Asymmetric Connections Between Bilingual Memory Representations", J. Mem. Lang., vol. 33, pp. 149-174, 1994 https://doi.org/10.1006/jmla.1994.1008
  11. E.A. Hirshorn, S.L. Thompson-Schill, "Role of the left inferior frontal gyrus in covert word retrieval: Neural correlates of switching during verbal fluency", NeuroPsychologia, vol. 44, pp. 2547-2557, 2006 https://doi.org/10.1016/j.neuropsychologia.2006.03.035
  12. O. Josephs, R.N.A. Henson, "Event-related fMRI: modeling, inference and optimization", Phil. Trans. R. Soc. Lond., vol. 354, pp. 1215-1228, 1999 https://doi.org/10.1098/rstb.1999.0475
  13. K.J. Friston, P. Fletcher, O. Josephs, A. Holmes, M.D. Rugg, R. Turner, "Event-related fMRI: characterizing differential response", NeuroImage, vol. 7, pp. 30-40, 1998 https://doi.org/10.1006/nimg.1997.0306
  14. N. Tzourio-Mayzoyer, B. Landeau, D. Papathanassiou, F. Crivello, O. Etard, N. Delcroix, B. Mazoyer, M. Jollot, "Automated anatomical labeling of activations in SPM using a macroscopic anatomical parcellation of the MNI MRI single-subject brain", NeuroImage, vol. 15, pp. 273-289, 2002 https://doi.org/10.1006/nimg.2001.0978
  15. G.F. Eden, K.M. Jones, K. Cappell, L. Gareau, F.B. Wood, T.A. Zeffiro, N.A. Dietz, J.A. Agnew, D.L. Flowers, "Neural changes following remediation in adult developmental dyslexa", Neuron, vol. 44, pp. 411-422, 2004 https://doi.org/10.1016/j.neuron.2004.10.019
  16. P.G. Simons, J.I. Breier, J.M. Fletcher, E. Bergman, A.C. Papanicolaou, "Cerebral mechanisms involved in word reading dyslexic children: magnetic source imaging approach", Cereb. Cortex, vol. 10, pp. 809-816, 2000 https://doi.org/10.1093/cercor/10.8.809
  17. P.E. Turkeltaub, L. Gareua, D.L. Flowers, T.A. Zeffiro, G.F. Eden, "Development of neural mechanisms for reading", Nat. Neurosci., vol. 6, pp. 767-773, 2003 https://doi.org/10.1038/nn1065
  18. L.E. Cutting, A.M. Clements, S. Courtney, S.L. Rimrodt, J.G. Schafer, J. Bisesi, J.J. Pekar, K.R. Pugh, "Differential components of sentence comprehension : beyond single word reading and memory", NeuroImage, vol. 29, pp. 429-438, 2006 https://doi.org/10.1016/j.neuroimage.2005.07.057
  19. S. Bookheimer, "Functional MRI of language: new approaches to understanding the cortical organization of semantic processing", Annu. Rev. Neurosci., vol. 24, pp. 151-188, 2002
  20. C.J. Price, C.J. Moore, G.W. Humphreys, R.J.S. Wise, "Segregating semantic from phonological processes during reading", J. Cogn. Neurosci., vol. 96, pp. 727-733, 1997
  21. M.H. Lehtonen, M. Laine, J. Niemi, T. Thomsen, V.A. Vorobyev, K. Hugdahl, "Brain correlates of sentence switching in Finnish- Norwegian bilinguals", Neuroreport, vol. 16, pp. 607-610, 2005 https://doi.org/10.1097/00001756-200504250-00018
  22. S. Valdois, S. Carbonnel, A. Juphard, M. Baciu, B. Ans, C. Peyrin, C. Segebarth, "Polysyllable pseudo-word processing in reading and lexical decision: converging evidence from behavior data, connectionist simulations and functional MRI", Brain Res., vol. 1085, pp. 149-162, 2006 https://doi.org/10.1016/j.brainres.2006.02.049
  23. S.M. Kosslyn, O. Koenig, A. Barrett, C.B. Cave, J. Tang, J.D. Gabrieli, "Evidence for two types of spatial representations: hemispheric specialization for categorical and coordinate relations", J. Exp. Psychol. Hum. Percept. Perform., vol. 15, pp. 723-735, 1989 https://doi.org/10.1037/0096-1523.15.4.723
  24. M.H. Davis, F. Meunier, W.D. Marslen-Wilson, "Neural responses to morphological, syntactic, and semantic properties of single words: An fMRI study", Brain lang., vol. 89, pp. 439-449, 2004 https://doi.org/10.1016/S0093-934X(03)00471-1
  25. M. Lehtonen, H. Niska, E. Wande, J. Niemi, M. Laine, "Recognition of inflected words in a morphologically limited language: frequency effects in monolinguals and bilinguals", J. Psycholinguist Res., vol. 35, pp. 121-146, 2006 https://doi.org/10.1007/s10936-005-9008-1
  26. H. Kim, D. Na, "Dissociation of pure Korean words and Chinesederivative words in phonological dysgraphia", Brain Lang., vol. 74, pp. 134-137, 2000 https://doi.org/10.1006/brln.2000.2329