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Related Experiment Video

Updated: Feb 7, 2026

The Spatial Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition
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Neural Activity Is Dynamically Modulated by Memory Load During the Maintenance of Spatial Objects.

Yali Pan1,2, Zheng Tan1,2, Zhiyao Gao1,2

  • 1CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.

Frontiers in Psychology
|July 19, 2018
PubMed
Summary
This summary is machine-generated.

Visuospatial working memory (WM) load dynamically impacts brain activity. Higher memory load initially increases neural activity, then decreases it later, affecting performance.

Keywords:
alpha oscillationdynamic neural activitymemory loadscalp EEGvisuospatial working memory

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • Visuospatial working memory (WM) is crucial for temporarily storing visual information.
  • Previous studies on WM load have been confounded by verbal and encoding load factors.

Purpose of the Study:

  • To investigate the neural mechanisms of visuospatial working memory load.
  • To control for verbal representation and encoding load in a novel task.

Main Methods:

  • Developed a novel delayed-match-to-sample task (DMST).
  • Recorded scalp electroencephalography (EEG) signals during the task.
  • Analyzed neural activity modulation by memory load.

Main Results:

  • Behavioral performance declined with increasing memory load.
  • Neural activity showed dynamic load-dependent changes in occipital, central, and frontal regions.
  • Alpha power in the occipital cortex decreased with higher memory load during the late delay period.
  • Late-delay neural activity correlated with reaction time, predicting behavioral performance.

Conclusions:

  • WM load exerts a dynamic, not constant, effect on neural activity.
  • Findings suggest 'gating by inhibition' in the occipital cortex.
  • The study provides insights into the neural basis of visuospatial WM maintenance.