截然不同的大脑范围的前突触网络是个体皮层神经元的功能特征的基础
bioRxiv : the preprint server for biology
|July 10, 2023
概括
了解大脑电路如何连接是行为关键. 这项研究揭示了特定的远程输入,特别是来自泰拉马斯的输入,塑造了神经元如何在体感皮质中跟踪行为状态.
科学领域:
- 神经科学是一个神经科学.
- 系统神经科学 系统神经科学
- 计算神经科学是一种神经科学.
背景情况:
- 神经元连接对大脑功能和行为至关重要.
- 了解个体神经元的大脑前突触连接规则对于破译功能选择性至关重要.
- 皮层神经元在对感官刺激和行为状态的选择性方面表现出异质性.
研究的目的:
- 为了研究前突触连接规则,规范着金字塔神经元对主要体感皮质 (S1) 中的行为状态的选择性.
- 探索大脑范围内的输入模式是如何根据行为背景对个体神经元的功能专业化作出贡献的.
主要方法:
- 两光子成像用于监测神经元活动.
- 神经药理学评估神经调节输入的作用.
- 基于单细胞的单突触输入追踪以映射突触前伙伴.
- 光遗传学用于操纵神经元活动并测试因果关系.
主要成果:
- 取决于行为状态的神经元活动模式是稳定的,主要由谷氨基输入驱动,调节最小.
- 追踪行为状态的神经元与其他神经元相比,会接收不同的远程谷氨酸输入.
- 具体来说,行为追踪神经元从运动皮层获得的输入较少,而从乳头层获得的输入更多.
- 对体输入的光遗传抑制会改变与行为状态相关的S1活动.
结论:
- 显著的长距离谷氨基基输入,特别是来自丘脑,作为预先配置的网络动态底层行为状态跟踪的基质.
- 这些发现强调了特定输入通路在塑造神经元选择性和促进行为方面的重要性.
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