后皮质的投影特异性电路对空间认知有不同的贡献
Xiaoxiao Lin1, Ali Ghafuri1, Xiaojun Chen1
1Department of Anatomy & Neurobiology, School of Medicine, University of California, Irvine, CA, 92697, USA.
Molecular psychiatry
|November 7, 2024
概括
后皮层 (RSC) 包含明确的电路,投射到二级运动皮层 (M2) 和背前丘脑 (AD). 这些电路具有独特的输入,并支持不同的空间记忆和认知功能.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 系统神经科学 系统神经科学
背景情况:
- 后皮质 (RSC) 涉及神经精神和神经退行性疾病.
- 它与皮层和皮层下区域的复杂连接性表明,专门的电路功能仍然在很大程度上无法确定.
- 假设并行通路,例如RSC到二级运动皮层 (M2) 和RSC到脊前体 (AD),可以差异地处理空间信息.
研究的目的:
- 量化描述向M2和AD投射的RSC神经元子群的 afferent和efferent连接.
- 为了比较这些不同的RSC电路的连接配置文件和功能角色.
- 阐明RSC-M2和RSC-AD途径对空间认知和记忆的具体贡献.
主要方法:
- 利用逆行和逆行病毒标志物来绘制神经连接的地图.
- 采用单突触逆行狂犬病病毒用于精确的电路跟踪.
- 执行了M2和AD投射RSC神经元的化学遗传抑制,以评估行为影响.
主要成果:
- 投射到M2和AD的RSC神经元表现出不同的 afferent输入模式和附带投射.
- 投射M2的RSC神经元从背部垂体,AD,乳头核和体感皮层获得更多的输入.
- 投射AD的RSC神经元从前带皮质和中间隔膜中获得更多的输入.
- 抑制M2投射的RSC神经元损害了对象位置记忆和位置动作关联.
- 抑制AD投射RSC神经元选择性损害对象位置记忆.
结论:
- 该RSC包括半独立的电路,具有明显的 afferent/efferent分布.
- 这些不同的电路对特定的认知功能有不同的贡献,包括空间记忆和关联.
- 了解这些电路可以了解RSC在认知过程和神经系统疾病中的作用.
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