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Brain areas involved in spatial working memory.

Marieke van Asselen1, Roy P C Kessels, Sebastiaan F W Neggers

  • 1Psychological Laboratory, Helmholtz Instituut, Utrecht University, Heidelberglaan 2, NL-3584 CS Utrecht, The Netherlands. masselen@ibili.uc.pt

Neuropsychologia
|November 23, 2005
PubMed
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Damage to specific brain regions, including the right posterior parietal cortex and right dorsolateral prefrontal cortex, impairs spatial working memory. This affects the ability to retain and recall object locations.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurobiology

Background:

  • Spatial working memory is crucial for daily tasks.
  • Understanding the neural basis of spatial working memory aids in diagnosing and treating cognitive deficits.

Purpose of the Study:

  • To identify brain regions critical for spatial working memory using a spatial search task.
  • To investigate the impact of focal brain damage on spatial memory performance.

Main Methods:

  • A spatial search task was administered to stroke patients and healthy controls on a touch-sensitive screen.
  • Error types (within-search and between-search) and strategy use were analyzed.
  • Performance was correlated with lesion locations in specific brain areas.

Related Experiment Videos

Main Results:

  • Damage to the right posterior parietal cortex and right dorsolateral prefrontal cortex led to increased within-search errors, indicating impaired online spatial information maintenance.
  • Damage to these areas plus the hippocampal formation bilaterally resulted in more between-search errors, suggesting deficits in longer-term spatial information retention.
  • Corsi Block-Tapping task performance also reflected these spatial memory impairments.

Conclusions:

  • The right posterior parietal cortex and right dorsolateral prefrontal cortex are vital for maintaining spatial information in working memory.
  • The hippocampal formation also plays a significant role in longer-term spatial information retention within working memory.
  • These findings highlight the neural substrates underlying spatial working memory and its vulnerability to brain injury.