在主观认知衰退和轻度认知障碍中,皮层和皮层下变化的形态特征和不对称性
Jin Yang1, Lingyan Liang2, Yichen Wei2
1School of Medicine, Guangxi University, Nanning, Guangxi, China.
Frontiers in neurology
|December 18, 2023
概括
轻度认知障碍 (MCI) 显示出显著的左侧大脑变化,而主观认知衰退 (SCD) 则有轻微的变化,可能表明早期阿尔茨海默病 (AD) 的进展. 这些大脑变化与认知能力下降相关,有助于早期AD诊断.
科学领域:
- 神经成像是一种神经成像.
- 神经学 神经学
- 阿尔茨海默氏症疾病研究研究
背景情况:
- 主观认知衰退 (SCD) 和轻度认知障碍 (MCI) 是认知衰退的早期阶段,通常是阿尔茨海默病 (AD) 之前的.
- 了解SCD和MCI的潜在神经解剖学变化对于早期诊断和干预至关重要.
- 大脑形态学,包括皮层和皮下结构,可能会揭示这些条件和健康衰老之间的微妙差异.
研究的目的:
- 研究和比较SCD和MCI患者的皮层和皮下形态变化及其不对称性.
- 确定这些形态变化是否与认知衰退的临床测量相关.
- 探索这些发现对早期AD诊断和治疗策略的潜力.
主要方法:
- 从62名SCD患者,97名MCI患者和70名健康对照 (HC) 获得结构性MRI扫描.
- 使用freesurfer软件量化皮质表面积,厚度,局部化指数 (LGI) 和皮质下体积.
- 计算了不对称性指数,并分析了形态变化和临床变量之间的相关性.
主要成果:
- 与HC相比,MCI患者在状圈和胰岛等区域表现出显著的左侧皮质表面变化.
- 在SCD患者中,变化较小,主要在insula和pars triangularis.
- MCI与下丘脑,海马体 (fimbria) 和丘脑的体积减少有关,与认知衰退评级有显著的相关性.
结论:
- 皮层和皮层下形态变化在MCI中很明显,可能会导致认知障碍.
- SCD患者可能会使用补偿机制来维持认知功能,尽管大脑发生了微妙的变化.
- 这些发现突出了神经成像生物标志物的潜力,用于早期发现和管理AD.
- 研究大脑不对称性为认知衰退的进展提供了宝贵的见解.
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