探索阿尔茨海默病的形态相似性和随机性,使用邻近的灰色物质基于voxel的结构分析
Ting-Yu Chen1,2, Jun-Ding Zhu2, Shih-Jen Tsai1,3,4
1Institute of Brain Science, National Yang Ming Chiao Tung University, Taipei, Taiwan.
Alzheimer's research & therapy
|April 23, 2024
概括
阿尔茨海默氏症改变了大脑结构,影响了海马和岛屿等关键区域的形态相似性和随机性. 这些变化与认知衰退相关,为大脑组织提供了新的见解.
科学领域:
- 神经成像是一种神经成像.
- 神经学 神经学
- 生物医学工程 生物医学工程
背景情况:
- 阿尔茨海默病 (AD) 的特点是明显的大规模结构性大脑变化.
- 形态相似性网络代表了大脑的结构组织,但在AD中,局部属性未得到充分探索.
- 调查局部形态特性对于理解AD的区域间结构相似性至关重要.
研究的目的:
- 通过使用当地的形态特征,探索阿尔茨海默病的区域间结构相似性和随机性.
- 评估阿尔茨海默病患者结构性随机性和认知表现之间的关系.
主要方法:
- 从ADNI中利用了342名正常对照和276名AD患者的T1加权MRI.
- 定义了灰色物质强度关系以计算结构模式指数和基于信息的相似性.
- 通过逐步回归检查了结构性随机性及其与认知得分的相关性.
主要成果:
- 患有阿尔茨海默氏症的个体在后带带状回环,海马和嗅觉皮层中表现出显著的结构模式变化.
- 观察到胰岛和额头区域之间的区域间结构相似性减少,海马和/皮下区域之间的相似性增加.
- 结构性随机性在部和皮下区域下降,在部和前部区域增加,与微型精神状态检查得分相关.
结论:
- 阿尔茨海默氏症与改变的微观结构模式和形态相似性有关,特别是涉及胰岛和海马.
- 在患有阿尔茨海默病的个体中,时间,额头和部区域的结构随机性受到显著的修改.
- 形态相似性和随机性为阿尔茨海默病中大脑结构组织提供了宝贵的见解.
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