平行通道携带方向和定位选择性视网膜信号到老鼠视觉皮层的第4层
Helen Wang1,2,3, Oyshi Dey1, Willian N Lagos1
1The Salk Institute for Biological Studies, La Jolla, CA 92037, USA.
bioRxiv : the preprint server for biology
|October 3, 2023
概括
鼠标的视觉路径显示,视网膜质细胞 (RGCs) 可能直接影响主视觉皮层 (V1) 调整. 一些RGC与V1神经元的方向和定位属性相匹配,表明遗传的视觉特征.
科学领域:
- 神经科学是一个神经科学.
- 视觉系统 视觉系统
- 哺乳动物视力 哺乳动物视力
背景情况:
- 在哺乳动物中,从视网膜到通过LGN到V1的平行视觉通路被保存.
- 鼠标视觉系统的复杂性在V1.1中提出了区分遗传与提取视觉特征的挑战.
研究的目的:
- 在小鼠中研究L4 V1神经元的功能性质与它们的RGC输入之间的关系.
- 为了确定视觉调特性是从视网膜通路中继承的还是通过V1电路提取的.
主要方法:
- 利用两个表达Cre的小鼠线 (Nr5a1-Cre和Scnn1a-Tg3-Cre) 来标记不同的L4神经元群体.
- 使用GCaMP6s的2光子成像来评估L4 V1神经元的视觉调特性.
- 使用Cre依赖的跨突触逆行标签,用G删除的狂犬病病毒来表征RGC输入.
主要成果:
- 在Nr5a1-Cre和Scnn1a-Tg3-Cre L4神经元之间观察到方向,定位,空间频率,时间频率和速度调节的显著差异.
- 识别了具有与其目标L4 V1神经元的方向和定向调相匹配的调特性的RGC.
结论:
- 这项研究表明,V1神经元中的方向和定位调整可以部分从视网膜输入中继承.
- 源自视网膜的并行通路可能在V1.1中塑造早期视觉处理中发挥关键作用.
- 提供了关于哺乳动物视觉系统中特征提取和遗传机制的见解.
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