模拟 thalamus 在静止状态功能连接中的作用:自然或结构
Jesús Cabrera-Álvarez1,2, Nina Doorn3, Fernando Maestú1,2
1Department of Experimental Psychology, Complutense University of Madrid, Madrid, Spain.
PLoS computational biology
|August 3, 2023
概括
泰拉木斯通过调节噪音输入而显著影响静止状态功能连接 (FC),而不仅仅是结构连接. 这一发现凸显了它在大脑动态和网络功能中的积极作用.
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.
- 大脑网络建模模型
背景情况:
- 传统上被视为被动感官中继器的丘脑,越来越多地被认为是它在大脑功能中的作用.
- 功能连接 (FC) 是大脑健康和疾病的关键生物标志物,经常在休息状态下进行研究.
- 泰拉马斯的中央网络位置和皮质激发中的作用表明,它可能对静止状态的FC有所贡献.
研究的目的:
- 为了研究这样一个假设,即丘脑主动塑造静止状态功能连接 (FC).
- 要确定体输入噪声,而不是结构连接,是其对大脑动态影响的关键.
- 探索信号与噪声比在泰拉马斯传播其自身动态中的作用.
主要方法:
- 使用神经成像数据 (MEG,MRI,dwMRI) 构建十个in-silico大脑网络模型.
- 模拟大脑活动与或没有 thalamus,操纵 thalamus 噪音水平.
- 将模拟FC与实证MEG数据进行比较,以评估模型性能.
主要成果:
- 一个带有较高噪音水平的分片性丘脑改善了模拟和实证FC之间的匹配.
- thalamus 对 FC 的影响是由噪音输入驱动的,而不是它的结构连接.
- 泰拉木斯中平衡的信号噪声比对于它传播其内在动态是必不可少的.
结论:
- 泰拉马斯积极塑造休息状态的大脑动态和功能连接.
- thalamic对FC的影响是由噪音输入的调制介导的,影响皮质活动.
- 这项研究强调了信号与噪声平衡以及中大脑功能的关键性的重要性.
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