患有主观认知衰退的患者的临床前大脑网络异常
Laura Serra1, Sabrina Bonarota1,2, Carlotta Di Domenico1,3
1Neuroimaging Laboratory, Fondazione Santa Lucia IRCCS, Rome, Italy.
Journal of Alzheimer's disease : JAD
|September 4, 2023
概括
个体主观认知衰退 (SCD) 呈现改变了脑功能连接 (FC) 在前端-双层网络,可能解释记忆问题. 这表明SCD可能代表阿尔茨海默病 (AD) 的早期阶段.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 放射学 放射学是一门学科.
背景情况:
- 阿尔茨海默病 (AD) 是全球痴呆的主要原因,目前没有疾病修饰治疗.
- 早期发现患有痴呆症高风险的个体对于临床试验开发至关重要.
- 主观认知衰退 (SCD) 描述了在没有客观缺陷的情况下感知认知衰退的个体,但却表现出与AD相关的脑脊液生物标志物.
研究的目的:
- 调查在主观认知衰退 (SCD) 的个体内大脑功能连接 (FC) 的变化.
主要方法:
- 23名SCD受试者和33名健康受试者 (HS) 完成了全面的神经心理评估.
- 获得3T-MRI扫描,包括T1加权成像和静止状态fMRI (RS-fMRI),以评估大脑缩和FC.
- 分析的重点是比较SCD和HS组之间的大脑结构和FC.
主要成果:
- 在SCD和HS组之间没有观察到灰质体积的显著差异.
- 与HS相比,SCD受试者在执行和状大脑网络中表现出增加和减少的FC.
- 在SCD和HS组中,认知评估 (特别是工作记忆) 和FC之间的相关性被确定.
结论:
- SCD个体表现出前额-双肩网络中改变的FC,可能与视觉空间工作记忆的减弱有关.
- 执行前额网络功能障碍可能是SCD个体所经历的主观认知衰退的基础,尽管神经心理测试得分正常.
- 这些发现支持将SCD视为阿尔茨海默病的潜在早期阶段,表明疾病进展的长期风险较高.
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