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Related Experiment Video

Updated: Apr 18, 2026

Generalized Psychophysiological Interaction PPI Analysis of Memory Related Connectivity in Individuals at Genetic Risk for Alzheimer's Disease
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Recollection-related increases in functional connectivity predict individual differences in memory accuracy.

Danielle R King1, Marianne de Chastelaine2, Rachael L Elward2

  • 1Center for Vital Longevity and School of Behavioral and Brain Sciences, University of Texas at Dallas, Dallas, Texas 75235 dking@utdallas.edu.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|January 30, 2015
PubMed
Summary
This summary is machine-generated.

Successful memory recollection involves enhanced functional connectivity between brain regions. This study found increased interactions in distributed brain networks during successful recall, offering insights into memory performance variations.

Keywords:
angular gyrusepisodic memoryfMRIfunctional connectivityhippocampusrecollection

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • Recollection retrieves specific contextual details of past events.
  • Functional neuroimaging identifies a core recollection network active during successful recall.

Purpose of the Study:

  • Investigate if core recollection network regions show increased functional connectivity during successful recollection.
  • Examine dynamic functional connectivity changes related to memory retrieval.

Main Methods:

  • Utilized functional magnetic resonance imaging (fMRI) in healthy adults.
  • Compared time-series correlations during successful versus unsuccessful recollection across three experiments.
  • Employed different operational definitions of recollection in each experiment.

Main Results:

  • A distributed set of brain regions showed increased functional connectivity with the core recollection network during successful recollection.
  • This effect was observed in both recollection-sensitive regions and areas without activity changes.
  • Connectivity increases correlated with individual recollection accuracy across widespread brain areas.

Conclusions:

  • Enhanced functional interactions among distributed brain regions characterize successful recollection.
  • Examining dynamic functional connectivity during episodic retrieval offers insights into individual memory differences.