Cited by 75Memory and Neural MechanismsSpatial Cognition and NavigationMemory Processes and Influences

From details to large scale: the representation of environmental positions follows a granularity gradient along the human hippocampal and entorhinal anterior-posterior axis

Evensmoen, Hallvard Røe, Ladstein, Jarle, Hansen, Tor Ivar, Møller, Jarle Alexander, Witter, Menno P., Nadel, Lynn, Håberg, Asta K.·2015·Hippocampus

Abstract

In rodents representations of environmental positions follow a granularity gradient along the hippocampal and entorhinal anterior-posterior axis; with fine-grained representations most posteriorly. To investigate if such a gradient exists in humans, functional magnetic resonance imaging data were acquired during virtual environmental learning of the objects' positions and the association between the objects and room geometry. The Objects-room geometry binding led to increased activation throughout the hippocampus and in the posterior entorhinal cortex. Within subject comparisons related specifically to the level of spatial granularity of the object position encoding showed that activation in the posterior and intermediate hippocampus was highest for fine-grained and medium-grained representations, respectively. In addition, the level of fine granularity in the objects' positions encoded between subjects correlated with posterior hippocampal activation. For the anterior hippocampus increased activation was observed for coarse-grained representations as compared to failed encoding. Activation in anterior hippocampus correlated with the number of environments in which the objects positions were remembered when permitting a coarse representation of positions. In the entorhinal cortex, activation in the posterior part correlated with level of fine granularity for the objects' positions encoded between subjects, and activation in the posterior and intermediate entorhinal cortex increased for medium-grained representations. This demonstrates directly that positional granularity is represented in a graded manner along the anterior-posterior axis of the human hippocampus, and to some extent entorhinal cortex, with most fine-grained positional representations posteriorly.

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Crossref · 10.1002/hipo.22357

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  • The anterior HF is involved in coding information about the coarse location of objects, the global position of landmarks, and the gist of memories.

    “it is involved in coding information about the coarse location of objects (Evensmoen et al., 2014), the global position of landmarks (Ekstrom et al., 2011; Morgan et al., 2011), and the gist of memories (Poppenk et al., 2008; Gutchess and Schacter, 2012).”

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Authors
Evensmoen, H. R., Ladstein, J., Hansen, T. I., Møller, J. A., Witter, M. P., Nadel, L., & Håberg, A. K.
Affiliations
  • Norwegian University of Science and Technology (NO)
  • University of Arizona (US)
  • Department of Neuroscience Norwegian University of Science and Technology (NTNU) Trondheim Norway
Corresponding author
Evensmoen, Hallvard Røe
Venue
Hippocampus
Publisher
Wiley
Published
2014-09-10
Volume
25
Issue
1
Pages
119-135
ISSN
  • 1050-9631 (ISSN-L)
  • 1098-1063
OpenAlex
W2143025132
Cited by
75
References
54
Citations by year
2026: 3 · 2025: 11 · 2024: 11 · 2023: 5 · 2022: 6 · 2021: 7 · 2020: 3 · 2019: 5 · 2018: 6 · 2017: 4 · 2016: 7 · 2015: 4 · 2014: 2 · 2013: 1
FWCI
3.16
Type
journal article
Language
en
Open access
closed
Locations
  • Hippocampus (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Physical Sciences › Engineering › Automotive Engineering › Spatial Cognition and Navigation
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
Keywords
spatial granularity, entorhinal cortex, anterior-posterior gradient, room geometry, spatial memory, hippocampal subfields
MeSH terms
Adolescent, Adult, Brain Mapping, Environment, Hippocampus, Humans, Magnetic Resonance Imaging, Male, Entorhinal Cortex, Young Adult, Spatial Learning

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