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<p>Are an individual’s first (L1) and second (L2) languages represented in shared or distinct brain territories? Using intraoperative electrical stimulation mapping (ESM) in two Basque-Spanish bilinguals with non-growing lesions—thus avoiding confounding effects of adaptive plasticity—this study identified distinct language representations within the left temporal lobe. Stimulation of posterior and anterior superior temporal gyri induced language-selective aphasias, whereas stimulation of the mid-temporal region and inferior fronto-occipital fasciculus produced naming errors without language specificity. These findings highlight both shared and distinct <i>loci</i> for L1 and L2, advancing our understanding of bilingual brain organization.</p>

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Transient selective aphasia in highly proficient bilinguals triggered by electrical stimulation of the left superior temporal gyrus

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月5日

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  • Ileana Quiñones,
  • Sandra Gisbert-Muñoz,
  • Garazi Bermudez,
  • Iñigo Pomposo,
  • Santiago Gil Robles,
  • Manuel Carreiras,
  • Lucia Amoruso

摘要

Are an individual’s first (L1) and second (L2) languages represented in shared or distinct brain territories? Using intraoperative electrical stimulation mapping (ESM) in two Basque-Spanish bilinguals with non-growing lesions—thus avoiding confounding effects of adaptive plasticity—this study identified distinct language representations within the left temporal lobe. Stimulation of posterior and anterior superior temporal gyri induced language-selective aphasias, whereas stimulation of the mid-temporal region and inferior fronto-occipital fasciculus produced naming errors without language specificity. These findings highlight both shared and distinct loci for L1 and L2, advancing our understanding of bilingual brain organization.