在轻度认知障碍中皮层和皮层下灰质异常
Junxia Wang1, Xue Liang1, Jiaming Lu1
1Department of Radiology, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China.
Neuroscience
|July 27, 2024
概括
轻度认知障碍 (MCI) 涉及灰质变化,特别是在海马和杏仁体,影响记忆力. 通过MRI检测到的结构性大脑变化可以准确地识别MCI患者.
科学领域:
- 神经成像是一种神经成像.
- 神经学 神经学
- 认知科学 认知科学
背景情况:
- 灰质变化与轻度认知障碍 (MCI) 的认知衰退有关.
- 了解这些结构变化对于诊断和管理MCI至关重要.
研究的目的:
- 与正常对照组 (NCs) 相比,研究MCI患者的皮层和皮层下结构差异.
- 探索这些结构变化与认知功能之间的关联.
- 评估机器学习模型在识别基于大脑结构的MCI时的准确性.
主要方法:
- 使用了基于voxel的形态测量 (VBM),基于顶点的形状分析和基于表面的形态测量 (SBM).
- 24名MCI患者和22名NC患者接受了结构性MRI扫描.
- 使用了斯皮尔曼相关性和支持向量机 (SVM) 分类.
主要成果:
- 患有MCI的患者在左丘脑,海马体,杏仁体和右骨中表现出显著的缩.
- 在左桃体中观察到向内变形.
- 在MCI中,SBM揭示了较浅的硫深度 (左半球) 和皮质转率指数 (GI) (右额头) 的增加.
- 右海马体积与情节性记忆正相关;改变的胃肠道与记忆性能负相关.
- 通过使用组合结构指标,SVM在区分MCI和NC方面实现了89%的准确性.
结论:
- 在MCI中发生显著的灰质结构变化,影响皮层下和皮层区域.
- 这些结构性改变与认知缺陷有关,特别是在记忆方面.
- 先进的神经成像分析与机器学习相结合,显示了准确检测MCI的前景.
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