嗅觉输入的皮质表示通过跨突触追踪.
Kazunari Miyamichi1, Fernando Amat, Farshid Moussavi
1HHMI/Department of Biology, Stanford University, Stanford, California 94305, USA.
Nature
|December 24, 2010
概括
研究人员绘制了小鼠的嗅觉路径,揭示了嗅球的气味地图是如何在皮质中处理的. 个别的皮质神经元整合来自广泛分布的嗅球球囊中的信号,不同的皮质区域显示出不同的输入模式.
科学领域:
- 神经科学是一个神经科学.
- 嗅觉系统研究 嗅觉系统研究
- 在Connectomics上,我们提供了连接.
背景情况:
- 鼠标的嗅觉球泡通过从嗅觉受体神经元到特定的淋巴细胞的融合轴突投影创建一个气味图.
- 在嗅觉皮层内,这种嗅觉球体气味图的表现在很大程度上仍然没有特征.
研究的目的:
- 为了研究嗅球的气味地图是如何在嗅觉皮质中表示的.
- 为了阐明接受嗅觉输入的皮质神经元的前突触连接性.
主要方法:
- 使用狂犬病病毒依赖的逆行单通突触标签.
- 采用遗传技术来控制"启动"皮质神经元来追踪前突触输入.
主要成果:
- 个体皮层神经元从多个 mitra 细胞接收收的输入,代表广泛分布的球粒.
- 在皮层区域中显示了嗅球输入的差异表示,皮层杏仁体偏好背部输入,皮质皮层采样广泛.
结论:
- 不同的嗅觉皮质区域以不同的方式处理嗅觉球泡信息,这可能反映了嗅觉偏好和记忆中的特殊功能.
- 开发的跨突触标记技术为绘制鼠标神经系统中的神经连接提供了一个多功能工具.
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