在小鼠中,第五层和第六层听觉皮质管轴突的高度分支和互补分布
Lina K Issa1,2, Nathiya V C Sekaran1,2, Daniel A Llano1,2,3,4
1Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Champaign, IL, United States.
Cerebral cortex (New York, N.Y. : 1991)
|June 30, 2023
概括
从第5层和第6层的听觉皮层投影广泛分支到多个大脑区域. 这些广泛的系统表现出互补的分布,影响皮质下听力处理.
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
- 皮层投射 皮层投射 皮层投射
背景情况:
- 听觉皮层显著影响皮层下听觉结构.
- 听觉皮质的突出来自第5层和第6层,具有独特的生理特征.
- 之前的研究表明5层投影的分支很大,但6层投影的独立性仍然在很大程度上没有得到检查.
研究的目的:
- 为了研究5层和6层的听觉皮质流神经元的分支模式.
- 为了确定第6层的皮质外投射是否独立.
- 为了利用皮质结晶系统作为研究这些投影的模型.
主要方法:
- 采用传统和新的技术来追踪投影路径.
- 利用双向逆向注射到下部结肠和听觉丘脑.
- 应用了截面方法,专门标记第5层或第6层皮质结合性神经元.
- 开发了一种新的方法,在单个小鼠中单独标记第5层和第6层轴突.
主要成果:
- 证实了5层和6层神经元的联合标签,注射到下层结核和听觉丘脑中.
- 证明第5层和第6层神经元都广泛地向多个皮质下目标投射.
- 揭示了5层和6层轴突之间的终端分布中的部分空间重叠.
- 识别的巨型终端仅在5层衍生的轴突中.
结论:
- 来自第5层和第6层的听觉皮层流突出并不是孤立的,而是形成了两个广泛的,广泛的系统.
- 观察到的分支模式和互补分布表明,在听觉处理中发挥了协调作用.
- 这些发现需要重新理解皮质流道作为综合系统而不是离散投影.
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