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Chromatic micromaps in primary visual cortex

Author

Listed:
  • Soumya Chatterjee

    (Harvard Medical School
    Allen Institute for Brain Science)

  • Kenichi Ohki

    (Harvard Medical School
    University of Tokyo School of Medicine)

  • R. Clay Reid

    (Harvard Medical School
    Allen Institute for Brain Science)

Abstract

The clustering of neurons with similar response properties is a conspicuous feature of neocortex. In primary visual cortex (V1), maps of several properties like orientation preference are well described, but the functional architecture of color, central to visual perception in trichromatic primates, is not. Here we used two-photon calcium imaging in macaques to examine the fine structure of chromatic representation and found that neurons responsive to spatially uniform, chromatic stimuli form unambiguous clusters that coincide with blobs. Further, these responsive groups have marked substructure, segregating into smaller ensembles or micromaps with distinct chromatic signatures that appear columnar in upper layer 2/3. Spatially structured chromatic stimuli revealed maps built on the same micromap framework but with larger subdomains that go well beyond blobs. We conclude that V1 has an architecture for color representation that switches between blobs and a combined blob/interblob system based on the spatial content of the visual scene.

Suggested Citation

  • Soumya Chatterjee & Kenichi Ohki & R. Clay Reid, 2021. "Chromatic micromaps in primary visual cortex," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-22488-3
    DOI: 10.1038/s41467-021-22488-3
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    Cited by:

    1. Yujie Wu & Minghui Zhao & Haoyun Deng & Tian Wang & Yumeng Xin & Weifeng Dai & Jiancao Huang & Tingting Zhou & Xiaowen Sun & Ning Liu & Dajun Xing, 2024. "The neural origin for asymmetric coding of surface color in the primate visual cortex," Nature Communications, Nature, vol. 15(1), pages 1-14, December.
    2. Peichao Li & Anupam K. Garg & Li A. Zhang & Mohammad S. Rashid & Edward M. Callaway, 2022. "Cone opponent functional domains in primary visual cortex combine signals for color appearance mechanisms," Nature Communications, Nature, vol. 13(1), pages 1-19, December.

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