The functional organisation of the hippocampus along its long axis is gradual and predicts recollection

Izabela Przeździk, Myrthe Faber, Guillén Fernández, Christian F. Beckmann, Koen V. Haak

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Understanding the functional organisation of the hippocampus is crucial for understanding its role in cognition and disorders in which it is implicated. Different views have been proposed of how function is distributed along its long axis: one view suggests segregation, whereas the alternative view postulates a more gradual organisation. Here, we applied a novel ‘connectopic mapping’ data-analysis approach to the resting-state fMRI data of participants of the Human Connectome Project, and demonstrate that the functional organisation of the hippocampal longitudinal axis is gradual rather than segregated into parcels. In addition, we show that inter-individual variations in this gradual organisation predict variations in recollection memory better than a characterisation based on functional parcellation. These results present an important step forward in understanding the functional organisation of the human hippocampus and have important implications for translating between rodent and human research.
Original languageEnglish
Pages (from-to)324-335
Number of pages12
JournalCortex
Volume119
DOIs
Publication statusPublished - 1 Oct 2019
Externally publishedYes

Keywords

  • Connectivity gradient
  • Connectopic mapping
  • Hippocampus
  • Longitudinal axis
  • Recollection

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