Initial Investigation of the Effects of an Experimentally Learned Schema on Spatial Associative Memory in Humans

Mariet van Buuren*, Marijn C. W. Kroes, Isabella C. Wagner, Lisa Genzel, Richard G. M. Morris, Guillen Fernandez

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Networks of interconnected neocortical representations of prior knowledge, "schemas," facilitate memory for congruent information. This facilitation is thought to be mediated by augmented encoding and accelerated consolidation. However, it is less clear how schema affects retrieval. Rodent and human studies to date suggest that schema-related memories are differently retrieved. However, these studies differ substantially as most human studies implement pre-experimental world-knowledge as schemas and tested item or non-spatial associative memory, whereas animal studies have used intraexperimental schemas based on item-location associations within a complex spatial layout that, in humans, could engage more strategic retrieval processes. Here, we developed a paradigm conceptually linked to rodent studies to examine the effects of an experimentally learned spatial associative schema on learning and retrieval of new object-location associations and to investigate the neural mechanisms underlying schema-related retrieval. Extending previous findings, we show that retrieval of schema-defining associations is related to activity along anterior and posterior midline structures and angular gyrus. The existence of such spatial associative schema resulted in more accurate learning and retrieval of new, related associations, and increased time allocated to retrieve these associations. This retrieval was associated with right dorsolateral prefrontal and lateral parietal activity, as well as interactions between the right dorsolateral prefrontal cortex and medial and lateral parietal regions, and between the medial prefrontal cortex and posterior midline regions, supporting the hypothesis that retrieval of new, schema-related object-location associations in humans also involves augmented monitoring and systematic search processes.

Original languageEnglish
Pages (from-to)16662-16670
Number of pages9
JournalJournal of Neuroscience
Volume34
Issue number50
DOIs
Publication statusPublished - 10 Dec 2014

Keywords

  • fMRI
  • medial prefrontal cortex
  • memory retrieval
  • schema
  • spatial associative memory
  • POSTERIOR PARIETAL CORTEX
  • PRIOR KNOWLEDGE
  • EPISODIC MEMORY
  • CUED-RECALL
  • RETRIEVAL
  • CONSOLIDATION
  • ATTENTION
  • NETWORK
  • BRAIN
  • FMRI

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