语言表现与年龄相关的变化的神经机制:一项试点fNIRS研究
Yuqian Shang1, Shuneng Zhong1, Manxu Zheng2
1School of Foreign Languages, South China University of Technology. Guangzhou, Guangdong 510641, China.
Neuroscience letters
|March 13, 2026
概括
老年人在图片命名过程中显示出大脑网络连接的改变,而不仅仅是区域激活变化. 基于任务的功能近红外光谱 (fNIRS) 揭示了语音生产网络中与年龄相关的差异.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 衰老研究研究 衰老研究
背景情况:
- 健康的衰老涉及神经重组,可能会影响语言的产生.
- 了解大脑网络中与年龄相关的变化对于认知健康至关重要.
研究的目的:
- 调查与年龄相关的皮质激活和功能连接在公开语音任务期间的差异.
- 探索神经组织的变化如何影响老年人语言的产生.
主要方法:
- 利用基于任务的功能近红外光谱 (fNIRS) 来测量大脑活动.
- 在图片命名和句子重复过程中,记录了氧化血红蛋白 (HbO) 对前及皮质的反应.
- 较年轻和较年长的普通话成年人进行比较.
主要成果:
- 在任何任务中,年龄组之间区域大脑激活 (HbO) 没有显著差异.
- 年长的成年人在图片命名过程中表现出潜在更强的背侧前额前-角-双侧连接,尽管在统计学上并不强大.
- 在修正后的句子重复过程中,没有发现显著的连接性差异.
结论:
- 语音产生中的与年龄相关的神经差异可能更多地表现在网络相互作用中,而不是区域激活.
- 基于任务的fNIRS是研究语音网络与年龄相关的调制的一个有希望的工具.
- 需要进一步的研究来证实老化语音网络中强大的连接差异.
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