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Related Concept Videos

Working Memory01:24

Working Memory

469
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...
469
Brain Waves01:23

Brain Waves

2.2K
Brain waves are electrical signals generated by the neurons in the brain, which are regularly monitored to measure mental activities. Brain waves and their frequency ranges can be measured using an electroencephalogram or EEG. There are four main types of brain waves, each with distinct characteristics:
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Related Experiment Video

Updated: Oct 5, 2025

Assessing Working Memory in Children: The Comprehensive Assessment Battery for Children – Working Memory (CABC-WM)
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Assessing Working Memory in Children: The Comprehensive Assessment Battery for Children – Working Memory (CABC-WM)

Published on: June 12, 2017

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Stable decoding of working memory load through frequency bands.

Meyi Duleme1, Stephane Perrey1, Gerard Dray1

  • 1EuroMov Digital Health in Motion, Univ Montpellier, IMT Mines Ales, Ales, France.

Cognitive Neuroscience
|January 27, 2022
PubMed
Summary
This summary is machine-generated.

Working memory load has both sustained and transient brain activity patterns. Combined frequency bands accurately decode task difficulty, revealing how working memory adapts to demands.

Keywords:
EEGMachine learningN-backPersistentWorking memory

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Area of Science:

  • Cognitive Neuroscience
  • Neurophysiology

Background:

  • Working memory is known to modulate brain activity across all frequency bands.
  • The adaptive mechanisms of distributed working memory under external demands are not fully understood.

Purpose of the Study:

  • To investigate frequency band modulations associated with working memory load, considering executive control.
  • To test the hypothesis that cognitive function synchronizations are time-sequenced to prevent interference and that decoding accuracy varies with task difficulty.

Main Methods:

  • Whole-scalp electroencephalography (EEG) data were collected from 12 healthy participants performing a visuo-spatial n-back task.
  • The task involved three conditions of increasing difficulty.
  • Evoked spectral perturbations and time-resolved decoding of individual synchronization were analyzed.

Main Results:

  • Persistent decoding above chance (83.17% AUC) was observed for combined frequency bands, outperforming isolated bands (65.93%–74.30% AUC).
  • Alpha-/beta-band synchronization (200–600 ms) and delta-/theta-band desynchronization (600–1000 ms) emerged transiently in parieto-occipital regions, aligning with hypotheses.
  • These findings indicate concurrent sustained and transient neural features of working memory load.

Conclusions:

  • Working memory load exhibits both stable and dynamic neural signatures.
  • This dynamic interplay may facilitate network stability and energy efficiency in complex cognitive tasks.
  • The results provide insights into the neural basis of working memory adaptation and executive control.