The neural origin for asymmetric coding of surface color in the primate visual cortex

Yujie Wu, Minghui Zhao, Haoyun Deng, Tian Wang, Yumeng Xin, Weifeng Dai, Jiancao Huang, Tingting Zhou, Xiaowen Sun, Ning Liu () and Dajun Xing ()
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Yujie Wu: Beijing Normal University
Minghui Zhao: Chinese Academy of Sciences
Haoyun Deng: Chinese Academy of Sciences
Tian Wang: Beijing Normal University
Yumeng Xin: Chinese Academy of Sciences
Weifeng Dai: Beijing Normal University
Jiancao Huang: Beijing Normal University
Tingting Zhou: Beijing Normal University
Xiaowen Sun: Beijing Normal University
Ning Liu: Chinese Academy of Sciences
Dajun Xing: Beijing Normal University

Nature Communications, 2024, vol. 15, issue 1, 1-14

Abstract: Abstract The coding privilege of end-spectral hues (red and blue) in the early visual cortex has been reported in primates. However, the origin of such bias remains unclear. Here, we provide a complete picture of the end-spectral bias in visual system by measuring fMRI signals and spiking activities in macaques. The correlated end-spectral biases between the LGN and V1 suggest a subcortical source for asymmetric coding. Along the ventral pathway from V1 to V4, red bias against green peaked in V1 and then declined, whereas blue bias against yellow showed an increasing trend. The feedforward and recurrent modifications of end-spectral bias were further revealed by dynamic causal modeling analysis. Moreover, we found that the strongest end-spectral bias in V1 was in layer 4C $$\beta$$ β . Our results suggest that end-spectral bias already exists in the LGN and is transmitted to V1 mainly through the parvocellular pathway, then embellished by cortical processing.

Date: 2024
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DOI: 10.1038/s41467-024-44809-y

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