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Related Experiment Video

Updated: Sep 11, 2025

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Intrinsic functional connectivity among memory networks does not predict individual differences in narrative recall.

Kyle Kurkela1, Maureen Ritchey1

  • 1Department of Psychology and Neuroscience, Boston College, Chestnut Hill, MA, United States.

Imaging Neuroscience (Cambridge, Mass.)
|August 13, 2025
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Summary

Brain connectivity differences do not explain individual memory variations in healthy adults. Functional connectivity within the default mode network did not predict narrative recall performance in a large study.

Keywords:
default networkepisodic memoryfunctional connectivityindividual differences

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Brain Imaging

Background:

  • Individual differences in episodic memory are significant but poorly understood in healthy young adults.
  • Episodic memory is thought to involve functional communication within the ventral default mode network (DMN-C) and its connections to medial temporal lobes.

Purpose of the Study:

  • To investigate the relationship between intrinsic functional connectivity of the DMN-C and individual differences in memory ability.
  • To explore if DMN-C connectivity predicts performance on a narrative recall task in a healthy young population.

Main Methods:

  • Utilized resting-state, movie-watching, and sensorimotor task fMRI data from 243 participants (ages 18-50) in the Cam-CAN dataset.
  • Estimated whole-brain intrinsic functional connectivity.
  • Applied connectome-based predictive modeling (CBPM) to identify predictive patterns for narrative recall.

Main Results:

  • No significant relationship was found between DMN-C functional connectivity (intrinsic, with other DMN subnetworks, or whole-brain) and narrative recall performance.
  • Exploratory CBPM identified a whole-brain multivariate pattern predicting memory performance, located largely outside canonical memory networks.

Conclusions:

  • Intrinsic functional connectivity of the DMN-C does not explain individual differences in narrative memory ability.
  • Memory performance may be influenced by brain connectivity patterns beyond traditionally recognized episodic memory networks.