上下注意力和阿尔茨海默氏症病理影响学习期间的皮质选择性,影响老年人的情节性记忆
Jintao Sheng1,2,3, Alexandra N Trelle2, America Romero1,2
1Department of Psychology, Stanford University, Stanford, CA, USA.
Science advances
|June 13, 2025
概括
衰老会通过减少神经选择性来损害记忆. 上下注意力和阿尔茨海默病 (AD) 病理进一步影响了这一点,影响了大脑如何表示信息,最终影响了记忆回忆.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 衰老研究研究 衰老研究
背景情况:
- 记忆力下降在衰老中很常见,可能与神经选择性降低有关.
- 导致神经选择性减弱的具体因素,如注意力和阿尔茨海默病 (AD) 病理,需要进一步调查.
研究的目的:
- 为了检查上下注意力和临床前AD病理如何影响老年人协会记忆任务期间的神经选择性.
- 为了确定神经选择性是否介导年龄,注意力,AD病理和记忆表现之间的关系.
主要方法:
- 功能性磁共振成像 (fMRI) 用于测量166个认知无障碍的老年人的大脑活动,在一个单词-面孔/单词-位置关联记忆任务中.
- 测量了化的Tau181 (pTau181) 血水平,以评估AD病理.
- 用路径分析来研究神经选择性的调解作用.
主要成果:
- 特定大脑区域的神经选择性 (位置和面部选择性) 对于记住的物品比遗忘的物品更高.
- 神经选择性与背部注意网络活动正相关,与pTau181水平负相关.
- 路径分析证实神经选择性介导了年龄,注意力和pTau181对记忆结果的影响.
结论:
- 与年龄相关的上下注意力下降和AD病理学都导致神经选择性降低.
- 由这些因素驱动的神经表现精度改变会影响老年人的记忆形成.
- 这项研究阐明了有助于老龄化记忆变异的独特途径,突出了注意力和AD生物标志物的作用.
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