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Related Experiment Videos

Right neglect following right hemisphere damage?

I H Robertson1, P W Halligan, C Bergego

  • 1MRC Applied Psychology Unit, Cambridge, UK.

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|June 1, 1994
PubMed
Summary
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Some stroke survivors with right brain damage paradoxically show more inattention to their right side. This may result from compensatory leftward scanning combined with general attention deficits.

Area of Science:

  • Neuroscience
  • Neurology
  • Cognitive Psychology

Background:

  • Visual inattention is common after right hemisphere brain damage.
  • Some patients exhibit more inattention to the right than the left, a phenomenon termed "paradoxical" inattention.

Purpose of the Study:

  • To investigate the phenomenon of paradoxical right-sided visual inattention in stroke patients.
  • To explore potential mechanisms underlying this unusual presentation.

Main Methods:

  • Analysis of 90 stroke cases with visual inattention.
  • Identification of 17 cases with greater right-sided inattention.
  • Review of neuroimaging (CT and MRI) for confirmation of unilateral right hemisphere damage in a subset of patients.

Main Results:

Related Experiment Videos

  • 17 out of 90 stroke cases demonstrated more right-sided than left-sided visual inattention.
  • Eight of these cases had confirmed unilateral right hemisphere damage via CT scan.
  • One case had confirmed unilateral right brain damage via MRI scan.

Conclusions:

  • The findings support the existence of paradoxical right-sided inattention.
  • A leading hypothesis suggests this arises from an interplay between a compensatory leftward scanning strategy and a non-lateralized attentional deficit.