与年龄相关的振荡动态的变化服务于语言工作记忆处理
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Seth D Springer1,2, Hannah J Okelberry1,2, Madelyn P Willett1,2
1Institute for Human Neuroscience, Boys Town National Research Hospital, Boys Town, NE 68010, USA.
Aging
|December 28, 2023
概括
健康的衰老会改变工作记忆任务期间的大脑活动. 老年人表现出,α和β振荡的不同模式,特别是在前额区域,影响记忆功能.
科学领域:
- 认知神经科学 认知神经科学
- 神经成像是一种神经成像.
- 衰老研究研究 衰老研究
背景情况:
- 工作记忆 (WM) 对认知至关重要,但随着年龄的增长而下降.
- 了解与年龄相关的WM变化对于开发干预措施至关重要.
- 这些与年龄相关的肌肉神经变化背后的神经机制需要进一步研究.
研究的目的:
- 在健康的老年人中研究工作记忆 (WM) 的神经机制.
- 检查老化如何影响WM任务的编码,维护和检索阶段的神经振荡.
主要方法:
- 磁脑电图 (MEG) 用于记录78名健康成年人的大脑活动 (年龄为20.265.2岁).
- 采用了一个带有字母刺激的Sternberg WM任务.
- 时间频率解析的光束形成和全脑统计分析了神经活动.
主要成果:
- 健康的衰老与视觉皮层和前额皮层编码期间的提达活性增加有关.
- 老年人在前额叶皮质的编码和维护过程中表现出α和β活动的较强下降.
- 在提取前额,顶部和部区域期间,在老年参与者中观察到增强的α和β活性下降.
结论:
- 健康的衰老显著调节神经振荡动态,支持工作记忆.
- 特定的与年龄相关的theta,alpha和beta振荡变化与不同任务阶段的WM表现有关.
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