在阿尔茨海默氏症的疾病进展中,大脑层次组织被破坏
Guillermo Montaña-Valverde1,2, Noelia Martínez-Molina2, David Aquilué-Llorens2
1Department of Translation and Language Sciences, Pompeu Fabra University, Barcelona, Spain.
medRxiv : the preprint server for health sciences
|December 19, 2025
概括
阿尔茨海默病破坏了大脑的层次结构,使其结构变平,减少了灵活性. 这种改变的大脑组织与认知能力下降有关,可能有助于早期检测.
科学领域:
- 神经科学是一个神经科学.
- 系统神经科学 系统神经科学
- 计算神经科学是一种神经科学.
背景情况:
- 阿尔茨海默氏病 (AD) 涉及粉样β,和神经退行之间复杂的相互作用.
- 这些病理过程对大脑大规模动态层次组织的影响仍然不太清楚.
研究的目的:
- 为了研究阿尔茨海默病如何改变大规模大脑动态的等级组织.
- 为了确定AD进展和认知衰退的神经成像生物标志物.
主要方法:
- 使用休息状态fMRI在AD连续 (健康对照,轻度认知障碍,AD痴呆症) 的134名参与者中量化定向因果相互作用.
- 模拟大脑活动,具有生成有效的连接性,并使用热量级和定向性评估层次结构.
- 使用机器学习来分类AD连续性的不同阶段.
主要成果:
- 健康的个体表现出一种正规的大脑层次结构,具有不同的源,调解 (默认模式网络) 和下沉区域.
- 阿尔茨海默病患者表现出视觉网络活动升高,体运动,突出,控制和DMN系统活动减少,表明层次结构平坦.
- 轻度认知障碍的参与者表现出体力运动和背部注意力网络的干扰.
- 机器学习成功地区分了所有疾病阶段,包括健康群体之间的早期差异.
- 层次变化与粉样蛋白,蛋白和神经退行 (ATN) 生物标志物以及认知衰退相关.
结论:
- 减少的等级性大脑结构是阿尔茨海默病的核心系统级特征.
- 来自大脑网络分析的热量指标可以作为AD进展的敏感生物标志物.
- 这些发现表明了早期阿尔茨海默病检测和有针对性的治疗干预的可能性.
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