The development of brain rhythms at rest and its impact on vocabulary acquisition.
The development of brain rhythms at rest and its impact on vocabulary acquisition.
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DOI：
10.1111/desc.13157
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发表时间：
2021-07
影响因子：
3.7
通讯作者：
Xiangyun Meng;Chen Sun;Boqi Du;Li Liu;Yuxuan Zhang;Qi Dong;George K. Georgiou;Y. Nan
中科院分区：
文献类型：
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作者：
Xiangyun Meng;Chen Sun;Boqi Du;Li Liu;Yuxuan Zhang;Qi Dong;George K. Georgiou;Y. Nan
发展科学中一个长期存在的问题是大脑的神经发育如何影响认知功能。在这里，我们研究了学龄儿童静息脑电图功率的发展变化及其与词汇习得的联系。我们进一步探讨了哪些机制可能介导大脑节律成熟与词汇知识之间的关系。每两年记录 53 名 7 岁至 11 岁之间发育正常的中国儿童的睁眼静息态脑电图数据。我们的结果首先表明，δ、θ 和伽马功率随着时间的推移而下降，而 α 和 β 功率随着时间的推移而增加。其次，在控制了一般认知能力、年龄、家庭读写环境和语音技能后，theta 下降分别解释了 9 岁和 11 岁表达词汇独特方差的 6.9% 和 14.4%。我们还发现，从 7 岁到 9 岁的 beta 增加显着预测了 11 岁时的接受性词汇量。最后，theta 通过 9 岁时的音素删除和 11 岁时的声调辨别的影响而减少了预测的表达性词汇量。这些结果证实了休息时的大脑振荡，尤其是 theta 节律在语言发展中的重要作用。大脑节律的发育变化可以作为学龄儿童词汇发展的敏感生物标志物，这对于识别有语言障碍风险的儿童具有重要价值。
A long-standing question in developmental science is how the neurodevelopment of the brain influences cognitive functions. Here, we examined the developmental change of resting EEG power and its links to vocabulary acquisition in school-age children. We further explored what mechanisms may mediate the relation between brain rhythm maturation and vocabulary knowledge. Eyes-opened resting-state EEG data were recorded from 53 typically-developing Chinese children every 2 years between the ages of 7 and 11. Our results showed first that delta, theta, and gamma power decreased over time, whereas alpha and beta power increased over time. Second, after controlling for general cognitive abilities, age, home literacy environment, and phonological skills, theta decreases explained 6.9% and 14.4% of unique variance in expressive vocabulary at ages 9 and 11, respectively. We also found that beta increase from age 7 to 9 significantly predicted receptive vocabulary at age 11. Finally, theta decrease predicted expressive vocabulary through the effects of phoneme deletion at age 9 and tone discrimination at age 11. These results substantiate the important role of brain oscillations at rest, especially theta rhythm, in language development. The developmental change of brain rhythms could serve as sensitive biomarkers for vocabulary development in school-age children, which would be of great value in identifying children at risk of language impairment.