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Preserved visuo-spatial transformations in representational neglect.

Sergio Della Sala1, Robert H Logie, Nicoletta Beschin

  • 1Human Cognitive Neuroscience, PPLS, University of Edinburgh, 7 George Square, Edinburgh, UK. sergio@ed.ac.uk

Neuropsychologia
|June 15, 2004
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Summary
This summary is machine-generated.

Patients with representational unilateral neglect struggle with recalling new information on their neglected side. This suggests a problem with visuo-spatial working memory, not just attention deficits.

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Area of Science:

  • Cognitive Neuroscience
  • Neuropsychology

Background:

  • Representational unilateral neglect is a condition affecting patients' awareness of one side of space.
  • Existing theories often attribute neglect to attention deficits.

Purpose of the Study:

  • To investigate the memory and attentional mechanisms underlying representational unilateral neglect.
  • To test the attention deficit hypothesis against alternative explanations.

Main Methods:

  • Assessed immediate recall of novel material presented visually or verbally on the neglected side.
  • Evaluated performance after mental rotation tasks involving material from the neglected side.
  • Compared performance when transforming material from the neglected to the non-neglected side.

Main Results:

  • Patients showed impaired immediate recall of material on the neglected side.
  • No additional recall loss occurred when transforming material from the neglected to the non-neglected side.
  • Patients could direct attention to the neglected side for mental rotation tasks.

Conclusions:

  • Findings challenge the attention deficit hypothesis for representational neglect.
  • Suggests that damage to temporary storage functions of visuo-spatial working memory underlies this disorder.