全球fMRI信号及其与骨信号的相关性
Daniel Huber1, Luna Rabl1, Chiara Orsini1
1Institute of Psychology, University of Innsbruck, Innsbruck, Austria.
NeuroImage
|July 26, 2024
概括
脑部扫描中的全球信号与骨和血管密切相关,这表明血管因素在休息期间显著影响大脑活动信号. 这挑战了以前关于全球信号起源的假设.
科学领域:
- 神经成像是一种神经成像.
- 血管生物学 血管生物学
- 大脑信号分析
背景情况:
- 功能成像中的全球信号是平均大脑活动指标.
- 它的起源,包括神经和血管组成部分,尚未完全理解.
- 休息状态功能连接性研究经常分析这个信号.
研究的目的:
- 调查全球信号和脑外信号之间的关联.
- 为了确定血管成分对全球信号的贡献.
- 为了澄清静止状态数据中全球信号波动的起源.
主要方法:
- 休息状态功能成像数据的分析.
- 多光谱细分以隔离骨,体内血管和静脉收集器.
- 相关性分析用于评估信号关联和共享方差.
主要成果:
- 在全球信号和来自头骨骨和皮下血管的信号之间发现了强烈的关联.
- 皮质下血管显示相对于皮质信号的相位延迟.
- 全球信号和骨信号之间的共享变异在某些个体中达到了80%.
结论:
- 血管成分,特别是与骨和血管系统相关的血管成分,在静止状态期间在全球信号中发挥着重要作用.
- 全球信号可能反映了涉及脑血管反应和自主控制的复杂相互作用.
- 这些发现需要重新评估神经成像中的全球信号处理.
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