Effects of Lateralization of Language on Cognition Among Left-Handers.

IF 3.6 Q1 LINGUISTICS

Neurobiology of Language Pub Date : 2025-04-24 eCollection Date: 2025-01-01 DOI:10.1162/nol_a_00165

Cristina Cano-Melle, Esteban Villar-Rodríguez, María Baena-Pérez, María Antonia Parcet, César Avila

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Abstract

Atypical language lateralization is associated with a different organization of the entire brain. However, it remains unknown whether this cerebral organization is linked to differences in cognitive task performance. In this study, several neuropsychological tests requiring fast processing speed were administered to left-handed participants, classified based on their language lateralization: left language dominance (n = 48), bilateral (n = 15), and right language dominance (n = 23). A factor analysis was conducted to derive three cognitive function dimensions: reading, articulation, and verbal reasoning; spatial processing; and interference/inhibition. The results showed that right language dominance was associated with poorer overall performance, particularly on tasks related to spatial processing, reading, articulation, and verbal reasoning. We conclude that the atypical development of language lateralization is accompanied by lower cognitive skills in tasks requiring speed of processing and interhemispheric connectivity.

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语言偏侧化对左撇子认知的影响。

非典型语言侧化与整个大脑的不同组织有关。然而，这个大脑组织是否与认知任务表现的差异有关尚不清楚。在这项研究中，对左撇子参与者进行了几项需要快速处理速度的神经心理学测试，并根据他们的语言偏侧性进行了分类：左侧语言优势（n = 48）、双侧语言优势（n = 15）和右侧语言优势（n = 23）。通过因子分析得出三个认知功能维度：阅读、发音和言语推理；空间加工;和干扰抑制。结果表明，正确的语言优势与较差的整体表现有关，特别是在空间处理、阅读、发音和口头推理等任务上。我们的结论是，语言侧化的非典型发展伴随着较低的认知技能在需要处理速度和半球间连接的任务。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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