神经证据表明,在健康老龄化过程中,对流体智能的功能补偿在健康老龄化过程中发挥作用
Ethan Knights1, Richard N Henson1,2, Alexa Morcom3
1Medical Research Council Cognition and Brain Sciences Unit, Cambridge, United Kingdom.
eLife
|January 8, 2025
概括
年长的成年人在解决问题的任务期间,在皮质皮质中增加了大脑活动. 在健康衰老中这种增强的神经招募可能会支持认知表现,提供功能补偿的证据.
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:
- 健康衰老中的功能补偿概念表明,老年人招募额外的大脑活动来维持认知功能.
- 这种补偿性大脑活动与老年人实际认知表现之间的联系仍然是积极研究和辩论的领域.
研究的目的:
- 在解决问题的任务中调查大脑活动,认知表现和年龄之间的关系.
- 为了确定在认知任务期间老年人大脑活动的增加是否反映了有助于表现的功能补偿.
主要方法:
- 功能磁共振成像 (fMRI) 用于测量寿命样本 (N=223) 执行流体智能解决问题的任务中的大脑活动.
- 单变量分析确定了与年龄和表现相关的活动的大脑区域,控制了脑血管反应.
- 多变量贝叶斯解码评估了特定大脑区域内激活模式的信息内容.
主要成果:
- 双边状皮层的活动随着年龄和解决问题任务的表现而增加.
- 这种与年龄相关的状活动增加独立于脑血管反应.
- 状皮层的激活模式提供了关于任务难度的独特信息,表明除了一般任务激活之外,还有一个补偿作用.
结论:
- 这些发现提供了强有力的证据,证明在健康老龄化中的视觉问题解决过程中,皮质皮质中存在功能补偿.
- 这个区域的神经活动增加似乎有助于维持老年人的认知表现.
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