The Impact of Foreign Language Learning on Cognitive Abilities in Older Adults: A Review under the Framework of Brain Plasticity Theory

Gong, Yuwen · 2025 · OpenAlex-citations

DOI: 10.54254/2753-7064/2025.bo23901

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Summary

This review paper examines the impact of foreign language learning on the cognitive abilities of older adults, grounded in the framework of brain plasticity theory. Motivated by the global aging population and the challenge of age-related cognitive decline, the study challenges the traditional view that brain plasticity diminishes with age. Instead, it posits that the elderly brain retains adaptive capacity through learning. The research addresses three primary questions: how brain plasticity supports language learning in older adults, which specific cognitive abilities are influenced, and how learning strategies can be optimized to enhance these skills. The methodology involves an in-depth review of existing academic reviews and empirical studies, including neuroimaging data and randomized controlled trials. The paper synthesizes findings from various sources to analyze neural structural changes, functional cognitive improvements, and social-mental health outcomes. It specifically highlights studies such as those by Bubbico et al., which utilized fMRI and DTI to observe brain changes after four months of language training, and other trials involving elderly participants learning languages like Spanish or English. The findings indicate that foreign language learning acts as a potent neural stimulus, inducing structural changes such as enhanced white matter integrity and reorganized gray matter volume in regions associated with executive control and semantic processing. Functionally, this training improves executive function, working memory, attention, and global cognition. For instance, learners showed shorter reaction times in Stroop tasks and improved performance in digit span tests. Beyond cognitive metrics, language learning promotes social integration, reduces depressive symptoms, and enhances well-being. The review also notes that individual differences, such as baseline prefrontal cortex thickness and motivation, moderate these benefits, while classroom anxiety can hinder effectiveness. The significance of this research lies in its provision of a scientific basis for targeted cognitive interventions in aging populations. The paper recommends optimizing course design through progressive difficulty gradients, multimodal inputs, and the integration of Computer-Assisted Language Learning (CALL). It suggests that each additional year of language learning may reduce the risk of mild cognitive impairment by 7%, advocating for the inclusion of language courses in community health programs. However, the authors acknowledge limitations in current research, such as small sample sizes and a lack of longitudinal data. Future directions include multi-center longitudinal studies to verify long-term effects, exploring cultural moderators, and developing cost-effective, scalable intervention programs to support healthier aging.

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