整个皮层网络模型的吸引力动态预测了小鼠大脑中fMRI协同激活模式的出现和结构
Diego Fasoli1, Ludovico Coletta2, Daniel Gutierrez-Barragan2
1School of Computer Science, University of Leeds, Leeds, United Kingdom.
PLoS computational biology
|February 20, 2026
概括
一个新的全皮质模型揭示了指导性解剖连接在小鼠大脑中塑造了休息状态功能磁共振成像 (fMRI) 动态. 这个模型解释了如何从吸引力动态中出现协同激活模式 (CAP),突出了光纤定向的重要性.
科学领域:
- 神经科学是一个神经科学.
- 计算神经科学是一种神经科学.
- 系统神经科学 系统神经科学
背景情况:
- 哺乳动物的休息状态功能磁共振成像 (fMRI) 信号显示复杂,快速的动态,包括反复的协同激活模式 (CAP).
- 了解解剖连接和这些动态fMRI信号之间的联系对于破译大脑功能至关重要.
研究的目的:
- 在小鼠大脑中开发出静止状态fMRI信号的全皮层计算模型.
- 研究指向的皮层-皮层解剖连接如何影响新出现的fMRI动态和CAPs.
主要方法:
- 开发了一种整体皮质模型,包括神经非线性,刺激-抑制相互作用和定向解剖连接 (来自艾伦老鼠大脑图谱).
- 模型参数与静态fMRI属性相匹配,并分析了其新出现的对动态.
- 经验性小鼠fMRI数据分析了吸引力动态的特征,并与模型预测进行了比较.
主要成果:
- 该模型成功地产生了丰富的吸引力动力学 (静止和振荡),即使适用于静态fMRI属性.
- 模型吸引器回顾了经验fMRI CAPs的地形组织.
- 忽视光纤方向性或改变半球间连接强度,显著降低了吸引器的数量和模型解释CAP的能力.
结论:
- 定向的皮层-皮层相互作用对于老鼠大脑中休息状态fMRI动态和CAPs的出现至关重要.
- 由CAPs捕获的框架智能BOLD活动是一个由解剖连接的方向性塑造的新兴属性.
- 这项研究为休息大脑的动态组织提供了新的理论见解.
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