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临床表现 临床表现

Alexandra J Weigand1, Fareshte Erani2, Caitlin M Terao3

  • 1Memory and Aging Center, University of California San Francisco, San Francisco, CA, USA.

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概括
此摘要是机器生成的。

认知健康的老年人表现出不同的认知模式. 较低的执行功能与脑血管问题有关,而低的记忆力可能通过单独的途径信号阿尔茨海默病风险.

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科学领域:

  • 神经科学是一个神经科学.
  • 老年学是一门学科.
  • 认知心理学 认知心理学

背景情况:

  • 认知正常 (CU) 的老年人表现出阿尔茨海默病和相关痴呆症 (ADRD) 的各种风险.
  • 在CU个体中识别早期认知表型对于及时干预至关重要.
  • 社区动脉样硬化风险 (ARIC) 研究为检查认知异质性提供了有价值的队列.

研究的目的:

  • 在CU老年人中使用数据驱动的方法来分类不同的认知表型.
  • 调查已识别的认知表型与ADRD/脑血管结果之间的关联.
  • 探索神经成像和生物标志物在认知表型之间的差异.

主要方法:

  • 在ARIC研究中,从4737 CU的老年人中,对10个人口调整的神经心理z-score进行了潜在的个人资料分析.
  • 基于人口统计,抑郁症状和血管风险因素 (VRF) 的表型比较.
  • 在子集中分析白质超强度 (WMH),海马体积 (HV) 和血生物标志物 (Aβ42/40,ptau181,NfL,GFAP).

主要成果:

  • 一个6类的解决方案确定了不同的认知表型 (例如,平均整体,低记忆,低执行力).
  • 在人口统计学,抑郁症状,VRF,WMH,HV,Aβ42/40,ptau181.1,等方面,表型显著不同.
  • 特定的表型显示了相关性:低执行力与高WMH,低记忆力与低Aβ42/40和高ptau181.

结论:

  • 认知异质性甚至存在于CU老年人中,这表明不同的风险轨迹.
  • 较低的执行性能与脑血管变化相关.
  • 记忆障碍与阿尔茨海默病相关的生物标志物有关,这表明认知能力下降的不同途径.