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健康衰老中持续注意力的结构性大脑相关性:LEISURE研究的横截面发现
Ciara Treacy1, Alicia J Campbell1, Toomas Erik Anijärv2
1Thompson Institute, University of the Sunshine Coast, Birtinya, QLD, Australia.
Neurobiology of aging
|September 19, 2024
概括
大脑结构,包括灰质和白质量,显著影响老年人的持续注意力. 大脑结构与年龄相关的变化完全解释了持续注意力的下降,为认知衰老提供了洞察力.
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
- 神经成像是一种神经成像.
背景情况:
- 持续的注意力对认知功能和衰老中的自主性至关重要.
- 老年人经常经历持续注意力的下降.
- 这些注意力变化的神经生物学基础尚未完全理解,使用结构性MRI (sMRI) 的研究有限.
研究的目的:
- 为了研究年龄,结构性大脑体积和健康老年人的持续注意力表现之间的关系.
- 探索大脑结构在衰老和持续注意力之间的关联中扮演的调解角色.
主要方法:
- 89名健康的老年人 (50-84岁) 接受了sMRI脑部扫描.
- 参与者完成了两个持续关注任务:快速视觉信息处理 (RVP) 和持续关注响应任务 (SART).
- 使用等级线性回归和调解分析来评估大脑体积和注意力之间的关系,考虑到年龄.
主要成果:
- 较大的白质超强度 (WMH) 量与较差的RVP性能相关.
- 增加的灰质量与更好的RVP性能有关.
- 较大的脑白质量与改善SART性能有关.
- 大脑的灰质和白质量完全介导了衰老对持续注意力的影响.
结论:
- 结构性大脑体积,包括灰质,白质和白质超强度,与老年人的持续注意力表现有显著联系.
- 这些发现强调了大脑结构在调解衰老和持续注意力之间的关系方面发挥的关键作用.
- 结构神经成像为与年龄相关的认知功能的变化提供了宝贵的见解,例如持续的注意力.
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