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The Neural Basis of Number and Person Phi-Features Processing: An Fmri Study in Highly Proficient Bilinguals Publisher



Meykadeh S1, 2 ; Golfam A1 ; Batouli SAH3 ; Sommer W2, 4
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Authors Affiliations
  1. 1. Department of Linguistics, Tarbiat Modares University, Tehran, Iran
  2. 2. Institut fur Psychologie, Humboldt-Universitat zu Berlin, Berlin, Germany
  3. 3. Department of Neuroscience and Addiction Studies, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Psychology, Zhejiang Normal University, Jinhua, China

Source: Bilingualism Published:2024


Abstract

No studies have investigated the neural correlates of Number and Person agreement processing in bilinguals. Because a previous fMRI study showed difference in L1 and L2 morphosyntactic processing of L1 Turkish–L2 Persian bilinguals, it was of interest whether this difference can be specifically attributed to Number or Person processing. Therefore, we reanalyzed these data at the whole-brain level, revealing a selective response for Number Violations in the pars opercularis (PO), whereas Number and Person Violations activated the posterior superior temporal gyrus (pSTG). These results support the decomposition of agreement projections and their neuroanatomical substrates in bilinguals and confirm the involvement of systematically different feature-checking and feature-mapping mechanisms in Number and Person agreement but shared mechanisms between L1 and L2. Moreover, at variance with previous reports, Number Violations evoked more effects than Person Violations in pSTG, suggesting qualitatively different processing underlying R-expression and pronominal controllers. © The Author(s), 2023.
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