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Multiscale Functional Connectivity analysis of episodic memory reconstruction.

Manuel Morante1, Kristian Frølich1, Muhammad Shahzaib2

  • 1Department of Electrical and Computer Engineering, Aarhus University, Aarhus, Denmark.

Frontiers in Cognition
|June 24, 2026
PubMed
Summary
This summary is machine-generated.

Sharing memories reconstructs events in the brain. This study reveals consistent Default Mode Network (DMN) functional connectivity (FC) patterns across timescales during memory reconstruction, highlighting temporal cortex involvement.

Keywords:
Default Mode Network (DMN)Multivariate Variational Mode Decomposition (MVMD)episodic memory (EM)fMRItemporal pole

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Social Cognition

Background:

  • Memory sharing is fundamental to social interaction.
  • Mental reconstruction of experienced events is possible even without direct experience.
  • Neuronal patterns during reconstructed memories are not fully understood.

Purpose of the Study:

  • To investigate functional connectivity (FC) patterns during memory reconstruction.
  • To compare brain activity when constructing memories from visual (movie) versus verbal information.
  • To explore the role of the Default Mode Network (DMN) and temporal cortex in memory sharing.

Main Methods:

  • Two independent functional magnetic resonance imaging (fMRI) experiments were conducted.
  • The Multiscale Functional Connectivity (MFC) technique was employed to analyze FC patterns across different timescales.
  • Participants' brain activity was measured while they mentally reconstructed scenes from a movie and from verbal descriptions.

Main Results:

  • The Default Mode Network (DMN) showed unique and consistent functional connectivity (FC) patterns across timescales.
  • Significant connectivity was observed within the temporal cortex, including the temporal pole and fusiform gyrus.
  • These temporal regions cooperated with the DMN in both memory reconstruction conditions.

Conclusions:

  • The Default Mode Network (DMN) is crucial for reconstructing memories from external information.
  • Multiscale Functional Connectivity (MFC) analysis reveals consistent neural patterns in memory reconstruction.
  • The temporal cortex, particularly the temporal pole and fusiform gyrus, plays a key role alongside the DMN in processing shared memories.