在阿尔茨海默氏症的疾病中改变了大脑功能梯度的半球横向化
Hao Liu1, Yunfei Li2, Zheng Sun1
1Department of Radiology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Journal of Alzheimer's disease : JAD
|May 22, 2025
概括
阿尔茨海默氏病 (AD) 患者在梯度网络中显示出大脑侧面化的减少,与健康个体不同. 在默认模式网络中,这种半球不对称的损失与认知衰退相关,这表明早期AD检测的潜在生物标志物.
科学领域:
- 神经科学是一个神经科学.
- 脑部成像 脑部成像
- 神经学 神经学
背景情况:
- 人类大脑在各个领域表现出固有的半球不对称性.
- 皮层梯度为大脑网络组织提供了一个框架,但它们在阿尔茨海默病 (AD) 中的分歧是未知的.
- 了解大脑组织中的半球差异对于神经退行性疾病研究至关重要.
研究的目的:
- 为了调查整个阿尔茨海默氏病 (AD) 连续性的半球间梯度横向化模式.
- 评估AD中改变的大脑横向化的临床相关性.
- 探索正常对照 (NC),轻度认知障碍 (MCI) 和AD患者之间的梯度网络差异.
主要方法:
- 利用了45名NC,45名MCI和45名AD参与者的静止状态功能磁共振成像 (fMRI) 数据.
- 处理了fMRI数据以分析梯度网络并计算17个网络的半球间侧面化指数 (L值).
- 采用单向ANOVA来比较跨组的L值,并进行相关性分析来将L值与认知分数联系起来.
主要成果:
- 正常对照组 (NC) 和轻度认知障碍组 (MCI) 在第二梯度中表现出左向横向化.
- 阿尔茨海默病 (AD) 患者表现出显著的半球间横向化的损失.
- 在AD患者的默认模式网络 (DMN) 和控制网络中观察到较少的横向化,DMN横向化与认知功能正相关.
结论:
- 阿尔茨海默病 (AD) 与大脑梯度网络中的横向化减少有关.
- 量化梯度横向性可能为早期AD检测和监测治疗疗效提供一种新的多模式生物标志物.
- 改变的大脑网络横向化模式为AD认知衰退的神经生物学基础提供了洞察力.
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