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阿尔茨海默氏症成像联盟

Emma Pineau1, Keying Chen2, Margaret M Koletar2

  • 1University of Toronto, Toronto, ON, Canada.

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此摘要是机器生成的。

在阿尔茨海默氏病模型中,大脑激活模式的变化随着年龄和认知衰退而增加. 这种变异性可能作为认知储备的神经生理学标记,为阿尔茨海默病的进展提供新的见解.

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科学领域:

  • 神经科学是一个神经科学.
  • 神经成像是一种神经成像.
  • 阿尔茨海默氏症疾病研究研究

背景情况:

  • 在阿尔茨海默病 (AD) 中的认知储备仍然不太了解.
  • 对刺激的反应中神经元的变化是一个已知的现象,但尚未在整个大脑中进行研究.
  • 神经元变异性,血管反应性和血液氧化水平依赖 (BOLD) 功能磁共振成像 (fMRI) 模式之间的假设联系.

研究的目的:

  • 调查整个大脑的神经和血管反应活性的变化.
  • 探索fMRI激活模式变化和认知储备之间的关系.
  • 利用AD的转基因老鼠模型来研究这些现象.

主要方法:

  • 采用长时间的BOLD fMRI协议与重复的体感官刺激.
  • 使用转基因Fischer 344大鼠 (TGF344-AD) 建模AD病理.
  • 通过Pearson的相关性,逐个试验分析了voxel级响应变异性和量化空间/时间变异性.

主要成果:

  • 大脑激活模式的变化随着年龄和认知障碍的增加而增加.
  • 将动物分为年轻,认知维持的老年和认知受损的老年群体.
  • 证明了与认知表现相关的激活模式可变性的群体间差异.

结论:

  • 开发的试验对激活模式可变性的群体间差异敏感.
  • 激活模式的变化与研究的AD模型中的认知表现相关.
  • fMRI激活模式的变化可能是一个强大的神经生理学相关的认知储备.