Transcranial photobiomodulation on the left inferior frontal gyrus enhances 
Mandarin Chinese L1 and L2 complex sentence processing performances

Yang, Mingchuan; Liu, Yang; Yue, Zhaoqian; Yang, Guang; Jiang, Xu; Cai, Yimin; Zhang, Yuqi; Yang, Xiujie; Li, Dongwei; Chen, Luyao

doi:10.1016/j.bandl.2024.105458

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Transcranial photobiomodulation on the left inferior frontal gyrus enhances Mandarin Chinese L1 and L2 complex sentence processing performances

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Chen, Luyao
Max Planck Partner Group, School of International Chinese Language Education, Beijing Normal University, China;
Department Neuropsychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Institute of Educational System Science, Beijing Normal University, China;

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Citation

Yang, M., Liu, Y., Yue, Z., Yang, G., Jiang, X., Cai, Y., et al. (2024). Transcranial photobiomodulation on the left inferior frontal gyrus enhances Mandarin Chinese L1 and L2 complex sentence processing performances. Brain and Language, 256: 105458. doi:10.1016/j.bandl.2024.105458.

Cite as: https://hdl.handle.net/21.11116/0000-000F-C98B-2

Abstract

This study investigated the causal enhancing effect of transcranial photobiomodulation (tPBM) over the left inferior frontal gyrus (LIFG) on syntactically complex Mandarin Chinese first language (L1) and second language (L2) sentence processing performances. Two (L1 and L2) groups of participants (thirty per group) were recruited to receive the double-blind, sham-controlled tPBM intervention via LIFG, followed by the sentence processing, the verbal working memory (WM), and the visual WM tasks. Results revealed a consistent pattern for both groups: (a) tPBM enhanced sentence processing performance but not verbal WM for linear processing of unstructured sequences and visual WM performances; (b) Participants with lower sentence processing performances under sham tPBM benefited more from active tPBM. Taken together, the current study substantiated that tPBM enhanced L1 and L2 sentence processing, and would serve as a promising and cost-effective noninvasive brain stimulation (NIBS) tool for future applications on upregulating the human language faculty.