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Shared structure facilitates working memory of multiple sequences.

Qiaoli Huang1,2,3,4, Huan Luo1,2,3

  • 1School of Psychological and Cognitive Sciences, Peking University, Beijing, China.

Elife
|July 24, 2024
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Summary
This summary is machine-generated.

This study shows that the brain uses shared structures to efficiently store multiple sequences in working memory (WM). This involves compressing information and replaying neural patterns, improving memory recall.

Keywords:
cognitive mapcommon trjectoryefficient codinghumanneural replayneurosciencesequenceworking memory

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Area of Science:

  • Cognitive Neuroscience
  • Human Memory Research
  • Working Memory Studies

Background:

  • Daily life requires processing multiple sequences, straining limited working memory (WM) capacity.
  • Efficient memory storage may involve leveraging shared relational structures to reorganize and compress information.

Purpose of the Study:

  • To investigate how the brain stores multiple sequences in working memory.
  • To explore the role of shared common structures and neural replay in efficient information organization.

Main Methods:

  • Participants memorized sequences of items with varying colors and spatial locations.
  • The consistency between color and location sequence trajectories was manipulated.
  • Memory performance, trajectory correlation, and neural reactivation patterns were analyzed.

Main Results:

  • Consistent trajectories in sequences improved memory performance and showed trajectory correlation.
  • Neural reactivation of common trajectories was observed with consistent sequences.
  • Spontaneous replay of color sequences occurred during location recall, correlating with WM behavior.

Conclusions:

  • A shared common structure is utilized for storing multiple sequences via compressed encoding.
  • Neural replay facilitates efficient information organization and recall in working memory.
  • Findings suggest a mechanism for overcoming working memory limitations in sequence processing.