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Spatial working memory deficit in unilateral neglect.

E Wojciulik1, M Husain, K Clarke

  • 1Institute of Cognitive Neuroscience, University College London, London WC1N 3AR, UK. ewa.wojciulik@mrc-cbu.cam.ac.uk

Neuropsychologia
|February 13, 2001
PubMed
Summary
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Neglect patients may have impaired spatial working memory (WM). This study found that a patient with neglect repeatedly cancelled items when only location was a cue, suggesting a spatial WM deficit.

Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Spatial working memory (WM) is crucial for processing location-based information.
  • Unilateral neglect is a cognitive disorder characterized by a failure to respond to stimuli on one side of space.

Observation:

  • A patient with left neglect and right frontal/basal ganglia damage performed cancellation tasks.
  • The patient made either visible or invisible marks to denote cancelled items.

Findings:

  • Invisible marks led to repeated cancellations for location-defined targets, but not for unique targets.
  • This suggests a specific deficit in spatial WM, while non-spatial WM remained intact.

Implications:

  • The findings support the hypothesis that spatial WM deficits contribute to neglect symptoms.

Related Experiment Videos

  • This challenges theories that solely attribute neglect to attentional capture by visible stimuli.