Cited by 191Memory and Neural MechanismsMemory Processes and InfluencesNeural dynamics and brain function

Big-loop recurrence within the hippocampal system supports integration of information across episodes

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Koster, Raphael, Chadwick, Martin J., Chen, Yi, Berron, David, Banino, Andrea, Düzel, Emrah, Hassabis, Demis, Kumaran, Dharshan·2018·Neuron

Abstract

Recent evidence challenges the widely held view that the hippocampus is specialized for episodic memory, by demonstrating that it also underpins the integration of information across experiences. Contemporary computational theories propose that these two contrasting functions can be accomplished by big-loop recurrence, whereby the output of the system is recirculated back into the hippocampus. We use ultra-high-resolution fMRI to provide support for this hypothesis, by showing that retrieved information is presented as a new input on the superficial entorhinal cortex-driven by functional connectivity between the deep and superficial entorhinal layers. Further, the magnitude of this laminar connectivity correlated with inferential performance, demonstrating its importance for behavior. Our findings offer a novel perspective on information processing within the hippocampus and support a unifying framework in which the hippocampus captures higher-order structure across experiences, by creating a dynamic memory space from separate episodic codes for individual experiences.

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Authors
Koster, R., Chadwick, M. J., Chen, Y., Berron, D., Banino, A., Düzel, E., Hassabis, D., & Kumaran, D.
Affiliations
  • Google DeepMind (United Kingdom) (GB)
  • German Center for Neurodegenerative Diseases (DE)
  • Lund University (SE)
Corresponding author
  • Chadwick, Martin J.
  • Kumaran, Dharshan
Venue
Neuron
Publisher
Elsevier BV
Published
2018-09
Volume
99
Issue
6
Pages
1342-1354.e6
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2890840786
Cited by
191
References
90
Citations by year
2026: 11 · 2025: 28 · 2024: 44 · 2023: 22 · 2022: 21 · 2021: 26 · 2020: 23 · 2019: 14 · 2018: 2
FWCI
9.60
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
  • DZNE Pub (submittedVersion)
Funders
German Research Foundation (SFB 779 A07)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
hippocampus, episodic memory, entorhinal cortex, functional connectivity, memory integration, memory spaces, hippocampal system
MeSH terms
Adult, Behavior, Brain Mapping, Cognition, Female, Hippocampus, Humans, Male, Temporal Lobe, Entorhinal Cortex, Memory, Episodic

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