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Working Memory01:24

Working Memory

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Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
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Behavioral variability and neural cross-frequency coupling distinguish working memory maintenance from manipulation.

Yingzhe Li1, Romy Lorenz2,3, Guang Ouyang1

  • 1Complex Neural Signals Decoding Lab, Faculty of Education, The University of Hong Kong, Hong Kong Island, Hong Kong.

Imaging Neuroscience (Cambridge, Mass.)
|March 4, 2026
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Summary

This study differentiates working memory (WM) maintenance and manipulation using matched tasks and neural measures. Manipulation involves broader brain networks and predicts performance, unlike maintenance, highlighting distinct cognitive and neural underpinnings.

Keywords:
cross-frequency couplingcross-individual variabilitymaintenancemanipulationworking memory

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Area of Science:

  • Cognitive Neuroscience
  • Neuroscience
  • Psychology

Background:

  • Working memory (WM) is crucial for cognition, traditionally divided into maintenance and manipulation.
  • Existing WM tasks often confound these components, limiting understanding of their individual variability and neural basis.
  • Differentiating WM maintenance and manipulation is essential for a precise characterization of cognitive control.

Purpose of the Study:

  • To develop and employ structurally matched tasks to isolate and compare behavioral variability in WM maintenance and manipulation.
  • To investigate the neural dynamics of WM maintenance and manipulation using phase-amplitude cross-frequency coupling (CFC).
  • To explore the differential association of neural correlates with individual differences in performance for each WM component.

Main Methods:

  • Development of two structurally matched behavioral task paradigms for WM maintenance and manipulation.
  • Psychometric analyses to assess the distinctiveness of the two WM components.
  • Application of phase-amplitude cross-frequency coupling (CFC) to analyze neural dynamics during task performance.

Main Results:

  • Psychometric analyses confirmed the behavioral differentiation between WM maintenance and manipulation.
  • Neural analyses revealed distinct brain network engagement for each component, with manipulation recruiting more extensive networks.
  • WM manipulation showed stronger and structurally distinct phase-amplitude CFC patterns compared to maintenance.
  • Individual differences in manipulation performance were predicted by CFC patterns, but not for maintenance.

Conclusions:

  • WM maintenance and manipulation represent distinct cognitive components with unique behavioral and neural signatures.
  • WM manipulation engages more widespread neural networks characterized by specific cross-frequency coupling dynamics.
  • The findings underscore the importance of component-specific analysis for understanding individual differences in working memory.