破碎的柱状小世界功能网络组织在小鼠听觉皮层的L2/3的体积
Zac Bowen1,2, Kelson Shilling-Scrivo3,4, Wolfgang Losert1
1Institute for Physical Science and Technology, University of Maryland, College Park, MD 20742, USA.
PNAS nexus
|February 28, 2024
概括
研究人员在听觉皮层中发现了一个混合组织,揭示了断裂的微柱和小世界网络. 这种结构将大规模的音位图与局部神经元调多样性联系起来.
科学领域:
- 神经科学是一个神经科学.
- 审计系统研究 审计系统研究
- 神经网络组织组织神经网络组织
背景情况:
- 感官皮层显示大规模的地形组织,就像主要听觉皮层的基于声音频率的音色地图一样.
- 然而,主要听觉皮层 (A1) 的2/3层 (L2/3) 在个体神经元水平上表现出功能异质性.
研究的目的:
- 研究L2/3 A1神经网络中的更高阶功能组织.
- 为了确定中级网络是否弥合了有序和无序的功能安排.
主要方法:
- 在清醒小鼠的L2/3 A1中的金字塔神经元的体内两光子成像.
- 使用音调刺激对受感场进行分析.
- 通过信号相关性 (SC) 的空间分布来表征功能网络.
主要成果:
- 观察到不同的受体场,在深度上有一些同样调节的神经元的局部化,但在L2/3亚层中较少.
- 鉴定出了一个破碎的微柱状组织 (半径~50μm),在更大的半径上有更多的随机组织.
- 功能网络表现出Rentian缩放和小世界拓,表明高效的空间嵌入和集群的功能相似性.
结论:
- L2/3 A1在大规模的色地图下展示了一个混合组织结构.
- 这种组织结合了微柱状结构和高效的小世界网络拓.
- 在这些复杂的网络架构中安排了显著的神经元调多样性.
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