Neural circuits for long-range color filling-in
Neural circuits for long-range color filling-in
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DOI：
10.1016/j.neuroimage.2018.06.083
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发表时间：
2018-11-01
期刊：
影响因子：
5.7
通讯作者：
Knoblauch, Kenneth
中科院分区：
文献类型：
--
作者：
Gerardin, Peggy;Abbatecola, Clement;Knoblauch, Kenneth
表面颜色外观取决于局部表面色度和全局环境。这些相互依赖是如何由皮质网络支持的？结合功能成像和心理物理学，我们检查了远程填充的颜色是否与均匀色度场引起的反应有不同的途径。我们发现，通过V3A和V3B/KO两个背区，填充的颜色分类最好，与外观的相关性也最好。相比之下，均匀色度的场最好由腹侧区域hV4和LO进行分类。动态因果模型显示，从V3A区域反馈调制到V1和LO区域进行填充，并与LO调制V1和V3A区域的反馈进行对比，以获得匹配的均匀色度。这些结果表明，背流通过V1区域的反馈调制以及腹侧区域的横流调制在颜色填充中起作用，这表明局部和上下文对颜色外观的影响涉及不同的神经网络。
Surface color appearance depends on both local surface chromaticity and global context. How are these inter-dependencies supported by cortical networks? Combining functional imaging and psychophysics, we examined if color from long-range filling-in engages distinct pathways from responses caused by a field of uniform chromaticity. We find that color from filling-in is best classified and best correlated with appearance by two dorsal areas, V3A and V3B/KO. In contrast, a field of uniform chromaticity is best classified by ventral areas hV4 and LO. Dynamic causal modeling revealed feedback modulation from area V3A to areas V1 and LO for filling-in, contrasting with feedback from LO modulating areas V1 and V3A for a matched uniform chromaticity. These results indicate a dorsal stream role in color filling-in via feedback modulation of area V1 coupled with a cross-stream modulation of ventral areas suggesting that local and contextual influences on color appearance engage distinct neural networks.