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Different clones for different contexts: Hippocampal cognitive maps as higher-order graphs of a cloned HMM

Nishad Gothoskar, View ORCID ProfileJ. Swaroop Guntupalli, View ORCID ProfileRajeev V. Rikhye, View ORCID ProfileMiguel Lázaro-Gredilla, View ORCID ProfileDileep George
doi: https://doi.org/10.1101/745950
Nishad Gothoskar
Vicarious AI, Union City, California 94587, nishad@vicarious.com, swaroop@vicarious.com, rajeev@vicarious.com, miguel@vicarious.com
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  • For correspondence: nishad@vicarious.com swaroop@vicarious.com rajeev@vicarious.com miguel@vicarious.com
J. Swaroop Guntupalli
Vicarious AI, Union City, California 94587, nishad@vicarious.com, swaroop@vicarious.com, rajeev@vicarious.com, miguel@vicarious.com
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  • ORCID record for J. Swaroop Guntupalli
  • For correspondence: nishad@vicarious.com swaroop@vicarious.com rajeev@vicarious.com miguel@vicarious.com
Rajeev V. Rikhye
Vicarious AI, Union City, California 94587, nishad@vicarious.com, swaroop@vicarious.com, rajeev@vicarious.com, miguel@vicarious.com
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Miguel Lázaro-Gredilla
Vicarious AI, Union City, California 94587, nishad@vicarious.com, swaroop@vicarious.com, rajeev@vicarious.com, miguel@vicarious.com
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Dileep George
Vicarious AI, Union City, California 94587, nishad@vicarious.com, swaroop@vicarious.com, rajeev@vicarious.com, miguel@vicarious.com
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Abstract

Hippocampus encodes cognitive maps that support episodic memories, navigation, and planning. Under-standing the commonality among those maps as well as how those maps are structured, learned from experience, and used for inference and planning is an interesting but unsolved problem. We propose higher-order graphs as the general principle and present, as a plausible model, a cloned hidden Markov model (HMM) that can learn these graphs efficiently from experienced sequences. In our experiments, we use the cloned HMM for learning spatial and abstract representations. We show that inference and planning in the learned CHMM encapsulates many of the key properties of hippocampal cells observed in rodents and humans. Cloned HMM thus provides a new frame-work for understanding hippocampal function.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted August 24, 2019.
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Different clones for different contexts: Hippocampal cognitive maps as higher-order graphs of a cloned HMM
Nishad Gothoskar, J. Swaroop Guntupalli, Rajeev V. Rikhye, Miguel Lázaro-Gredilla, Dileep George
bioRxiv 745950; doi: https://doi.org/10.1101/745950
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Different clones for different contexts: Hippocampal cognitive maps as higher-order graphs of a cloned HMM
Nishad Gothoskar, J. Swaroop Guntupalli, Rajeev V. Rikhye, Miguel Lázaro-Gredilla, Dileep George
bioRxiv 745950; doi: https://doi.org/10.1101/745950

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