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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

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.

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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:

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  • 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.