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首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >Input to V2 thin stripes arises from V1 cytochrome oxidase patches.
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Input to V2 thin stripes arises from V1 cytochrome oxidase patches.

机译：V2细条纹的输入来自V1细胞色素氧化酶斑块。

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摘要

Parallel streams from the primary visual cortex (V1) to the second visual area (V2) are thought to mediate different aspects of visual perception in primates. One hypothesis is that the projection from cytochrome oxidase patches to thin stripes is responsible for color, whereas a separate pathway from interpatches to pale stripes mediates form. Recently, the notion of segregated pathways has been challenged by a report showing that patches and interpatches project equally to thin stripes. We made injections of a retrograde tracer, cholera toxin-B (CTB-Au), into macaque V2 thin stripes and counted the number of labeled cells in patches versus interpatches in layer 2/3. Analysis of eight thin-stripe injections showed that a mean of 81% of labeled cells were located in patches (defined as 33% of the surface area of V1). This result confirms that the projection to thin stripes arises predominately from patches. To assess the segregation of patch and interpatch projections, we injected CTB-Au in a pale stripe and horseradish peroxidase in an adjacent thin stripe. In both successful cases, interdigitated fields of labeled cells were present in V1. Less than 1% of cells were double-labeled, indicating that the populations of cells supplying thin stripes and pale stripes are quite independent. This finding means that different signals are likely conveyed by patches and interpatches to V2.
机译：从初级视觉皮层（V1）到第二视觉区域（V2）的并行流被认为可以调节灵长类动物视觉感知的不同方面。一种假设是，从细胞色素氧化酶斑块到细条的投影负责颜色，而从斑块间到浅条的单独途径介导形成。最近，隔离路径的概念受到了一份报告的挑战，该报告表明斑块和斑块均等地投射到细条纹上。我们向猕猴V2细条纹中注射了逆行示踪剂霍乱毒素B（CTB-Au），并计算了2/3层中斑块与斑块之间标记细胞的数量。对八次细条注射液的分析表明，平均有81％的标记细胞位于贴剂中（定义为V1表面积的33％）。该结果证实，对薄条纹的投影主要由斑块引起。为了评估补丁和补丁间投影的隔离，我们在浅色条纹中注入了CTB-Au，在相邻的细条纹中注入了辣根过氧化物酶。在两个成功的案例中，V1中都存在标记细胞的交叉指域。少于1％的细胞被双重标记，表明提供细条和浅条的细胞群是非常独立的。这一发现意味着补丁和补丁之间可能会向V2传递不同的信号。

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