Title | Spatiotemporal dynamics of bilingual word processing. |
Publication Type | Journal Article |
Year of Publication | 2010 |
Authors | Leonard MK, Brown TT, Travis KE, Gharapetian L, Hagler DJ, Dale AM, Elman JL, Halgren E |
Journal | Neuroimage |
Volume | 49 |
Issue | 4 |
Pagination | 3286-94 |
Date Published | 2010 Feb 15 |
ISSN | 1095-9572 |
Keywords | Adolescent, Adult, Brain, Brain Mapping, Female, Functional Laterality, Humans, Magnetoencephalography, Male, Multilingualism, Nerve Net, Pattern Recognition, Visual, Reading, Semantics, Young Adult |
Abstract | Studies with monolingual adults have identified successive stages occurring in different brain regions for processing single written words. We combined magnetoencephalography and magnetic resonance imaging to compare these stages between the first (L1) and second (L2) languages in bilingual adults. L1 words in a size judgment task evoked a typical left-lateralized sequence of activity first in ventral occipitotemporal cortex (VOT: previously associated with visual word-form encoding) and then ventral frontotemporal regions (associated with lexico-semantic processing). Compared to L1, words in L2 activated right VOT more strongly from approximately 135 ms; this activation was attenuated when words became highly familiar with repetition. At approximately 400 ms, L2 responses were generally later than L1, more bilateral, and included the same lateral occipitotemporal areas as were activated by pictures. We propose that acquiring a language involves the recruitment of right hemisphere and posterior visual areas that are not necessary once fluency is achieved. |
DOI | 10.1016/j.neuroimage.2009.12.009 |
Alternate Journal | Neuroimage |
PubMed ID | 20004256 |
PubMed Central ID | PMC2824560 |
Grant List | HD53136 / HD / NICHD NIH HHS / United States K23 NS05609 / NS / NINDS NIH HHS / United States K23 NS056091 / NS / NINDS NIH HHS / United States K23 NS056091-04 / NS / NINDS NIH HHS / United States N01 NS18741 / NS / NINDS NIH HHS / United States R01 HD053136 / HD / NICHD NIH HHS / United States R01 HD053136-08 / HD / NICHD NIH HHS / United States R01 NS018741 / NS / NINDS NIH HHS / United States R01 NS018741-25 / NS / NINDS NIH HHS / United States T32 MH020002 / MH / NIMH NIH HHS / United States T32 MH020002-09 / MH / NIMH NIH HHS / United States T32 MH20002 / MH / NIMH NIH HHS / United States |
Spatiotemporal dynamics of bilingual word processing.
Category:
IRG Funded