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Brain-optimized deep neural network models of human visual areas learn non-hierarchical representations

Author

Listed:
  • Ghislain St-Yves

    (University of Minnesota
    University of Minnesota)

  • Emily J. Allen

    (University of Minnesota)

  • Yihan Wu

    (University of Minnesota)

  • Kendrick Kay

    (University of Minnesota
    University of Minnesota)

  • Thomas Naselaris

    (University of Minnesota
    University of Minnesota)

Abstract

Deep neural networks (DNNs) optimized for visual tasks learn representations that align layer depth with the hierarchy of visual areas in the primate brain. One interpretation of this finding is that hierarchical representations are necessary to accurately predict brain activity in the primate visual system. To test this interpretation, we optimized DNNs to directly predict brain activity measured with fMRI in human visual areas V1-V4. We trained a single-branch DNN to predict activity in all four visual areas jointly, and a multi-branch DNN to predict each visual area independently. Although it was possible for the multi-branch DNN to learn hierarchical representations, only the single-branch DNN did so. This result shows that hierarchical representations are not necessary to accurately predict human brain activity in V1-V4, and that DNNs that encode brain-like visual representations may differ widely in their architecture, ranging from strict serial hierarchies to multiple independent branches.

Suggested Citation

  • Ghislain St-Yves & Emily J. Allen & Yihan Wu & Kendrick Kay & Thomas Naselaris, 2023. "Brain-optimized deep neural network models of human visual areas learn non-hierarchical representations," Nature Communications, Nature, vol. 14(1), pages 1-16, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38674-4
    DOI: 10.1038/s41467-023-38674-4
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    References listed on IDEAS

    as
    1. Carsen Stringer & Marius Pachitariu & Nicholas Steinmetz & Matteo Carandini & Kenneth D. Harris, 2019. "High-dimensional geometry of population responses in visual cortex," Nature, Nature, vol. 571(7765), pages 361-365, July.
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    3. Kendrick N. Kay & Thomas Naselaris & Ryan J. Prenger & Jack L. Gallant, 2008. "Identifying natural images from human brain activity," Nature, Nature, vol. 452(7185), pages 352-355, March.
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