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Related Concept Videos

Working Memory01:24

Working Memory

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 information.

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Related Experiment Video

Updated: May 30, 2026

Developing Neuroimaging Phenotypes of the Default Mode Network in PTSD: Integrating the Resting State, Working Memory, and Structural Connectivity
10:43

Developing Neuroimaging Phenotypes of the Default Mode Network in PTSD: Integrating the Resting State, Working Memory, and Structural Connectivity

Published on: July 1, 2014

Visual working memory load-related changes in neural activity and functional connectivity.

Ling Li1, Jin-Xiang Zhang, Tao Jiang

  • 1Key Laboratory for NeuroInformation of Ministry of Education, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China. liling@uestc.edu.cn

Plos One
|July 27, 2011
PubMed
Summary
This summary is machine-generated.

Brain network connectivity differs between visual fields during memory tasks. Theta and alpha band synchrony in the right visual field (RVF) is linked to slower reaction times and lower accuracy in visual working memory (VWM).

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Human Electrophysiology

Background:

  • Visual working memory (VWM) is crucial for storing visual information for subsequent actions.
  • The neural mechanisms underlying VWM capacity and information maintenance remain unclear.
  • Load-related changes in functional connectivity for hemi-field VWM retention are largely unknown.

Purpose of the Study:

  • To investigate load-dependent and visual-field-dependent changes in functional connectivity during VWM retention.
  • To explore the relationship between neural network properties and behavioral performance in VWM tasks.

Main Methods:

  • Electroencephalography (EEG) recorded from 14 participants performing a bilateral visual field memory task.
  • Analysis of event-related potentials (ERPs) and functional connectivity (EEG phase synchronization) across theta, alpha, beta, and gamma bands.
  • Graph theory metrics (mean degree, clustering coefficient, shortest path length) computed as a function of memory load.

Main Results:

  • Brain network properties in all frequency bands were dependent on memory load and visual field.
  • Theta and alpha band synchrony were more prominent in the right visual field (RVF) than the left visual field (LVF) during retention.
  • RVF theta-band network density correlated with delayed reaction times, and alpha-band network topology correlated with reduced accuracy.

Conclusions:

  • Differences in theta and alpha band functional connectivity and network topology between LVF and RVF conditions may underlie performance deficits in RVF tasks.
  • These findings provide insights into the neural basis of VWM capacity limitations and hemispheric asymmetries.