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Bálint syndrome.

Laure Pisella1, Audrey Vialatte1, Aarlenne Zein Khan2

  • 1Trajectoires, Centre de Recherche en Neurosciences de Lyon, Inserm, CNRS, Université Lyon 1, Bron, France.

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|April 9, 2021
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Summary
This summary is machine-generated.

Bálint syndrome symptoms stem from a core mislocalization deficit, impacting spatial awareness and accuracy. This deficit in covert attention affects both visual perception and visuomotor control, explaining various clinical presentations.

Keywords:
Bálint–HolmesCovert attentionOptic ataxiaPosterior parietal cortexSimultanagnosiaSpatial cognitionSpatial neglectVisual remapping

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Clinical Neurology

Background:

  • Bálint syndrome is characterized by a complex set of visual-spatial and visuomotor deficits.
  • Previous research has proposed various etiological accounts for Bálint syndrome.
  • The role of attention and spatial processing in Bálint syndrome remains a key area of investigation.

Purpose of the Study:

  • To review historical interpretations of Bálint syndrome.
  • To propose a novel integrative view of Bálint syndrome based on a core mislocalization deficit.
  • To link this deficit to attentional and spatial processing impairments.

Main Methods:

  • Review of existing literature and interpretations of Bálint syndrome.
  • Development of a novel theoretical model integrating symptoms under a core deficit.
  • Correlation of proposed deficit with existing findings on covert attention and spatial resolution.

Main Results:

  • Bálint syndrome symptoms arise from a core deficit in spatial mislocalization.
  • This mislocalization is linked to impaired covert attention, affecting visual perception (simultanagnosia, neglect) and visuomotor accuracy (optic ataxia).
  • A model of posterior parietal cortex organization is proposed, implicating superior areas in covert attention and the right inferior part in visual remapping.

Conclusions:

  • The proposed integrative view offers a unified explanation for the diverse symptoms of Bálint syndrome.
  • Impaired covert attention and subsequent spatial mislocalization are central to the syndrome's pathophysiology.
  • Damage to the right inferior parietal cortex exacerbates mislocalizations, worsening the clinical presentation.