在MoCA评估的认知表现相关的关键白物质途径的分数异位变化
Nauris Zdanovskis1,2,3, Kalvis Kaļva1,2,3, Ardis Platkājis1
1Department of Radiology, Riga Stradins University, Dzirciema iela 16, LV-1007 Riga, Latvia.
Neurology international
|October 28, 2025
概括
白质道中的微分异构 (FA) 在认知表现组之间显示出显著的差异. 中度认知障碍显示FA高于低绩效,这表明FA高于低绩效.
科学领域:
- 神经成像和神经科学 神经成像和神经科学
- 生物标志物发现发现
- 认知神经学 认知神经学
背景情况:
- 认知障碍会影响白质的完整性.
- 来自扩散张力成像 (DTI) 的微分异构 (FA) 测量了白质微观结构.
- 作为认知衰退的生物标志物,FA的实用性需要进一步研究.
研究的目的:
- 为了研究由认知表现分层的个体中白质道的微分异构 (FA) 差异.
- 评估FA作为认知障碍敏感生物标志物的潜力.
- 为了将FA值与蒙特利尔认知评估 (MoCA) 的分数相关联.
主要方法:
- 70名参与者 (57-96岁) 被分为高 (MoCA ≥26),中等 (MoCA 18-25) 和低 (MoCA <18) 的认知表现类别.
- 扩散张力成像 (DTI) 用于测量FA在关键白质通道,包括皮质脊髓通道,高级纵向囊,下面的前额囊囊和带.
- 使用统计分析,包括ANOVA和后期测试,以在不同组中比较FA值.
主要成果:
- 在多个白质区域的认知群体中,在FA值和规范百分位数中发现了显著的差异.
- 与表现不佳的组相比,中等表现的组在左侧和右侧上方纵向筋 - 弧形和左侧和右侧下方前后筋中显示出明显更高的FA.
- 这些发现表明,与不同水平的认知功能相关的显著的微观结构模式.
结论:
- 分数异构性 (FA) 变化在由MoCA评分定义的认知性能组中是明显的.
- 与低表现相比,在中度认知障碍中较高的FA表明FA和认知衰退之间存在复杂的关系.
- 虽然这些结果是初步的,但支持需要进行更大规模的多模式研究,以验证FA作为早期认知障碍潜在生物标志物的作用.
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