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Publication Detail
Predictive maps in rats and humans for spatial navigation
  • Publication Type:
    Journal article
  • Authors:
    De Cothi W, Nyberg N, Griesbauer E-M, Ghanamé C, Zisch F, Lefort JM, Fletcher L, Newton C, Renaudineau S, Bendor D, Grieves R, Duvelle É, Barry C, Spiers HJ
  • Publisher:
    Elsevier BV
  • Publication date:
  • Journal:
    Current Biology
  • Medium:
  • Status:
  • Country:
  • Print ISSN:
  • PII:
  • Language:
  • Keywords:
    artificial intelligence, cognitive map, decision making, detour, hippocampus, planning, reinforcement learning, shortcut, spatial navigation, successor representation
  • Notes:
    Copyright © 2022 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Much of our understanding of navigation comes from the study of individual species, often with specific tasks tailored to those species. Here, we provide a novel experimental and analytic framework integrating across humans, rats, and simulated reinforcement learning (RL) agents to interrogate the dynamics of behavior during spatial navigation. We developed a novel open-field navigation task ("Tartarus maze") requiring dynamic adaptation (shortcuts and detours) to frequently changing obstructions on the path to a hidden goal. Humans and rats were remarkably similar in their trajectories. Both species showed the greatest similarity to RL agents utilizing a "successor representation," which creates a predictive map. Humans also displayed trajectory features similar to model-based RL agents, which implemented an optimal tree-search planning procedure. Our results help refine models seeking to explain mammalian navigation in dynamic environments and highlight the utility of modeling the behavior of different species to uncover the shared mechanisms that support behavior.
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