AoA-L2 和 Usage-L2 调节皮层下皮层的功能神经可塑性
Xiaojin Liu1, Zhenni Gao2, Wen Liu1
1Center for Educational Science and Technology, Beijing Normal University, Zhuhai 519087, China.
Brain and language
|September 27, 2023
概括
双语体验塑造了大脑的连接. 早些时候的第二语言学习和更高的家庭使用减少了皮下功能连接,而社交使用增加了它.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 心理语言学 心理语言学
背景情况:
- 以前的研究表明,单语者和双语者之间存在结构性大脑差异.
- 多种双语体验对皮下功能神经可塑性的影响在很大程度上仍未被探索.
研究的目的:
- 研究第二语言学习年龄 (AoA-L2) 和第二语言使用年龄 (Usage-L2) 如何影响双语个体的皮层下皮层和皮层内皮层功能连接 (FC).
- 探索特定的双语体验与在皮层下大脑区域内的功能连接模式之间的关系.
主要方法:
- 利用双语参与者的休息状态功能磁共振成像 (fMRI) 数据.
- 使用多重回归分析将大脑测量与双语体验变量 (AoA-L2和Usage-L2) 相关联.
- 专注于在皮层下结构内部和皮层结构之间功能连接的分析.
主要成果:
- 较高的AoA-L2与包括前丘脑,基底和海马体在内的区域的皮下FC减少相关.
- 在家增加L2的使用与杏仁体,白色球体,海马体和核的FC降低有关.
- 相反,在社会环境中较高的L2使用率与这些皮层下区域的FC有积极的关联.
结论:
- 双语体验显著调节皮下大脑结构的功能性神经可塑性.
- 双语的特殊性质,包括学习年龄和使用背景,对皮下功能连接有不同的影响.
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