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Related Experiment Videos

Ipsilesional neglect: behavioural and anatomical features.

M Kim1, D L Na, G M Kim

  • 1Department of Neurology, University of Florida College of Medicine, FL, USA.

Journal of Neurology, Neurosurgery, and Psychiatry
|June 17, 1999
PubMed
Summary

Ipsilesional neglect, a spatial deficit, is linked to frontal-subcortical brain lesions. This condition may stem from attentional or intentional biases, not just compensatory strategies.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Spatial neglect is a neurological condition characterized by a deficit in attention to one side of space.
  • Ipsilesional neglect, a rarer form, involves neglect of the contralesional side of space, posing diagnostic challenges.

Purpose of the Study:

  • To investigate the behavioral and anatomical characteristics of ipsilesional neglect.
  • To differentiate between sensory-attentional and motor-intentional mechanisms in ipsilesional neglect.

Main Methods:

  • Thirty patients with spatial neglect underwent cancellation and line bisection tasks.
  • A specialized video apparatus was employed to distinguish between sensory-attentional and motor-intentional neglect types.
  • Lesion locations were analyzed in patients exhibiting ipsilesional neglect.

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Main Results:

  • Five patients demonstrated ipsilesional neglect, exclusively on the line bisection task.
  • All ipsilesional neglect cases were associated with frontal-subcortical lesions.
  • Some patients exhibited ipsilesional neglect without prior contralateral neglect, challenging compensatory strategy explanations.

Conclusions:

  • Ipsilesional neglect is predominantly linked to frontal-subcortical brain damage.
  • The phenomenon is not solely a compensatory strategy and can arise from attentional and/or intentional biases.
  • Right-sided frontal or subcortical injuries may lead to contralateral attentional or intentional 'approach' behaviors.