休息状态网络隔离调节语言生产中的年龄相关差异
Haoyun Zhang1,2, Michele T Diaz2
1Centre for Cognitive and Brain Sciences, University of Macau, Macau SAR, China.
Neurobiology of language (Cambridge, Mass.)
|August 7, 2023
概括
老化的大脑显示网络分离减少,影响语言生产. 虽然语言网络保持稳定,但更广泛的脑网络变化可能解释了与年龄相关的说话能力下降.
科学领域:
- 神经科学是一个神经科学.
- 认知老龄化 认知老龄化
- 语言处理语言处理.
背景情况:
- 老年人经常经历语言生产的下降.
- 在衰老中支持或阻止语言产生的神经机制尚未完全被理解.
- 关于与年龄有关的神经变化存在竞争理论,包括补偿与效率下降的对比.
研究的目的:
- 通过使用静止状态功能连接来研究与年龄相关的语言生产差异的神经基础.
- 检查年龄如何影响语言生产表现,功能连接和它们的相互关系.
- 测试假设,语言网络内外的网络分离与年龄不同,与性能有关.
主要方法:
- 使用了休息状态功能连接性分析.
- 网络隔离被评估在左半球语言网络和整个大脑.
- 在不同年龄组中分析了网络隔离与语言生产能力之间的关系.
主要成果:
- 年龄较大与较差的语言生产表现相关.
- 左半球语言网络分离保持稳定,但整个大脑网络分离随着年龄的增长而下降.
- 更高的网络隔离与年轻/中年人的更好的语言生产有关,但不是老年人;这种关联对于整个大脑隔离更强.
结论:
- 网络隔离是大脑功能的有价值指标,与语言生产能力相关联.
- 虽然左半球语言网络表现出稳定性,但更广泛的大脑网络中的脱差是衰老的特征.
- 在语言网络之外的这种神经分化可能是语言生产中与年龄相关的困难的基础.
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