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Related Concept Videos

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A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze each...
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Related Experiment Video

Updated: Jun 14, 2026

Generalized Psychophysiological Interaction (PPI) Analysis of Memory Related Connectivity in Individuals at Genetic Risk for Alzheimer's Disease
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Persistent schema-dependent hippocampal-neocortical connectivity during memory encoding and postencoding rest in

Marlieke T R van Kesteren1, Guillén Fernández, David G Norris

  • 1Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, PO Box 9101, 6500 HB Nijmegen, The Netherlands. marlieke.vankesteren@donders.ru.nl

Proceedings of the National Academy of Sciences of the United States of America
|April 6, 2010
PubMed
Summary
This summary is machine-generated.

Strong prior knowledge reduces hippocampal-vmPFC connectivity during memory encoding. This pattern persists after learning, suggesting this brain network aids new memory integration when schema is absent.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Memory Research

Background:

  • The hippocampus integrates new information into long-term memory by strengthening cortical connections.
  • Hippocampal crosstalk with the ventromedial prefrontal cortex (vmPFC) is crucial for memory integration.
  • Prior associative networks, or schemas, may facilitate memory integration.

Purpose of the Study:

  • To investigate the role of hippocampal-vmPFC connectivity in memory integration.
  • To examine how prior schema knowledge influences hippocampal-vmPFC crosstalk during memory encoding and rest.
  • To determine if hippocampal-vmPFC connectivity aids memory integration in the absence of a relevant schema.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to track brain activity.
  • Prior schema knowledge was manipulated by scrambling a movie for half of the participants.
  • Connectivity was analyzed using intersubject synchronization (ISS) and partial correlation during encoding and postencoding rest.

Main Results:

  • Successful manipulation of prior schema knowledge was confirmed.
  • Stronger prior schema was linked to increased vmPFC ISS and decreased hippocampal-vmPFC connectivity during encoding.
  • This altered connectivity pattern persisted during postencoding rest.

Conclusions:

  • Reduced hippocampal-vmPFC crosstalk may reflect efficient memory integration when a prior schema is present.
  • Increased hippocampal-vmPFC connectivity might be necessary to compensate for integration difficulties without a schema.
  • Hippocampal-neocortical crosstalk may continue during offline periods after learning, supporting memory consolidation.