代谢连接对年龄和认知具有比功能连接更大的预测效用
Hamish A Deery1,2, Emma X Liang1,2, Chris Moran3
1School of Psychological Sciences, Monash University, Melbourne 3800, Australia.
Brain communications
|February 26, 2025
概括
高时间分辨率功能性 (18F) - 氧葡萄糖正子发射断层扫描 (fPET) 脑部成像揭示了随着衰老而发生的代谢连接性变化. 与功能磁共振成像 (fMRI) 相比,这种方法对年龄和认知具有更大的预测效用.
科学领域:
- 神经科学是一个神经科学.
- 医疗成像医学成像
- 老年学是指老年学的学科.
背景情况:
- 功能性 (18F) - 氧葡萄糖正子发射断层扫描 (fPET) 测量了在突触后神经元中的脑代谢in vivo.
- 功能磁共振成像 (fMRI) 反映了神经元活动的综合代谢,血液动力学和血管成分.
- 在研究大脑衰老和认知方面,fPET与fMRI的比较价值仍然不清楚.
研究的目的:
- 为了比较年轻和老年人的代谢 (fPET) 和功能 (fMRI) 连接性.
- 评估fPET和fMRI连接对于年龄和认知表现的预测能力.
- 为了研究大脑代谢和功能连接的与年龄相关的变化.
主要方法:
- 在40名年轻人和46名老年人中同时获得fPET/fMRI.
- 全脑fPET和fMRI连接体的截面比较.
- 分析网络内部和网络之间的连接和图表指标.
主要成果:
- fPET和fMRI连接体表现出中度的拓相似性.
- 与fMRI相比,fPET揭示了更多与年龄相关的连接性和图表度差异.
- fPET连接预测了比fMRI更多的认知领域的表现.
结论:
- 大脑衰老与代谢连接性重新配置有关,与血液动力学变化不同.
- 通过fPET测量的代谢连接性,比功能连接性 (fMRI) 对年龄和认知提供了更大的预测实用性.
- 通过fPET测量的葡萄糖动力学变化显示为与年龄相关的认知衰退的生物标志物具有前途.
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