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Related Experiment Video

Updated: Jul 5, 2025

Horizontal Hippocampal Slices of the Mouse Brain
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Parallel cognitive maps for multiple knowledge structures in the hippocampal formation.

Xiaochen Y Zheng1, Martin N Hebart2,3, Filip Grill1,4

  • 1Donders Institute for Brain, Cognition and Behaviour, Radboud University, 6525 EN, Nijmegen, the Netherlands.

Cerebral Cortex (New York, N.Y. : 1991)
|January 11, 2024
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Summary
This summary is machine-generated.

The brain

Keywords:
fMRI adaptationhippocampusrelational knowledgesemantic representation

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Neuroimaging

Background:

  • The hippocampal-entorhinal system is crucial for forming cognitive maps representing spatial and relational information.
  • Objects can possess multiple, diverse relational characteristics simultaneously.
  • It remains unclear how the hippocampal formation integrates stimuli within multiple relational structures acquired over different timescales.

Purpose of the Study:

  • To investigate whether the hippocampal formation creates a single conjunctive map or parallel maps for different relational structures.
  • To determine how the brain represents objects embedded in multiple, distinct relational frameworks.

Main Methods:

  • Reanalysis of human functional magnetic resonance imaging (fMRI) data.
  • Application of fMRI adaptation analysis to assess representational similarity.
  • Examination of data from Garvert et al. (2017) concerning a learned transition structure.

Main Results:

  • Representational similarity in the hippocampus decreased with increasing semantic distance between objects.
  • Both transition and semantic structure representations were found in the hippocampal formation.
  • The semantic map was located in posterior hippocampal regions, distinct from the transition structure map.

Conclusions:

  • The hippocampal-entorhinal system likely forms parallel cognitive maps for diverse relational structures.
  • Different stimulus dimensions are represented in anatomically distinct maps within the hippocampal formation.
  • This supports a model of parallel processing for relational information in the brain.