Functional MRI study of semantic and phonological language processing in bilingual subjects: Preliminary findings

Jay J. Pillai, Julio Mario Araque Gonzalez, Jerry David Allison, Sankara N Sethuraman, David W. Loring, Dharma S Thiruvaiyaru, Claro B. Ison, Aparna Balan, Tom Lavin

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

The objective of the study was to explore differences in regional fMRI activation topography and lateralization between semantic and phonological tasks performed in English and Spanish in bilingual individuals. Eight bilingual (primary Spanish and secondary English-speaking) individuals performed fMRI noun-verb association and rhyming tasks in both Spanish and English. Functional dataset analysis within Statistical Parametric Mapping (SPM99) with overlay on T1-weighted anatomic images was performed. Significantly higher laterality indices were noted in the semantic tasks as compared with the phonological tasks in the anterior regions of interest comprising the frontal and superior temporal lobes. A task subtraction analysis demonstrated right hemispheric (inferior frontal gyrus and supramarginal gyrus) foci of significantly increased activation in the combined language phonological tasks compared to the combined language semantic tasks; similarly prominent right hemispheric activation was seen in the English phonological-English semantic subtraction, but the analogous Spanish task subtraction revealed no task-related differences. This divergence in activation topography between semantic and phonological tasks performed in the nonnative language, but not in the primary language, suggests that neural networks utilized for phonological and semantic language processing in the nonnative language may not be as similar as those in the primary language.

Original languageEnglish (US)
Pages (from-to)565-576
Number of pages12
JournalNeuroImage
Volume19
Issue number3
DOIs
StatePublished - Jul 1 2003

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Semantics
Language
Magnetic Resonance Imaging
Parietal Lobe
Temporal Lobe
Prefrontal Cortex

ASJC Scopus subject areas

  • Neurology
  • Cognitive Neuroscience

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Functional MRI study of semantic and phonological language processing in bilingual subjects : Preliminary findings. / Pillai, Jay J.; Araque Gonzalez, Julio Mario; Allison, Jerry David; Sethuraman, Sankara N; Loring, David W.; Thiruvaiyaru, Dharma S; Ison, Claro B.; Balan, Aparna; Lavin, Tom.

In: NeuroImage, Vol. 19, No. 3, 01.07.2003, p. 565-576.

Research output: Contribution to journalArticle

Pillai, Jay J. ; Araque Gonzalez, Julio Mario ; Allison, Jerry David ; Sethuraman, Sankara N ; Loring, David W. ; Thiruvaiyaru, Dharma S ; Ison, Claro B. ; Balan, Aparna ; Lavin, Tom. / Functional MRI study of semantic and phonological language processing in bilingual subjects : Preliminary findings. In: NeuroImage. 2003 ; Vol. 19, No. 3. pp. 565-576.
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