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A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
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A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

Published on: April 11, 2025

Visual neglect in posterior cortical atrophy.

Katia Andrade1, Dalila Samri, Marie Sarazin

  • 1INSERM UMR_S 975, Centre de Recherche de l'Institut du Cerveau et de Moelle épinière, Cognition, neuro-imagerie et maladies du cerveau, Paris, France. andrade-k@hotmail.com

BMC Neurology
|August 12, 2010
PubMed
Summary
This summary is machine-generated.

Visual neglect is common in posterior cortical atrophy (PCA), affecting over half of patients. Early detection using specific tests is crucial for managing daily activities and understanding brain damage in PCA.

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Published on: December 8, 2023

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Neurology

Background:

  • Posterior cortical atrophy (PCA) involves progressive visual dysfunction and parietal lobe damage.
  • Visual neglect may be underestimated in PCA due to the need for specific assessment tools.
  • This study investigates the prevalence, side, and severity of visual neglect in PCA.

Purpose of the Study:

  • To determine the frequency and characteristics of visual neglect in PCA.
  • To assess visual extinction and primary visual field defects in PCA patients.
  • To highlight the clinical importance of diagnosing neglect in PCA.

Main Methods:

  • Prospective study of 24 right-handed PCA patients.
  • Utilized a standardized battery of neglect tests.
  • Visual fields assessed via clinical confrontation method.

Main Results:

  • 66% of PCA patients showed signs of visual neglect.
  • 58% exhibited visual extinction or hemianopia.
  • Right-sided neglect was more frequent (29%) than in prior focal lesion studies.

Conclusions:

  • Visual neglect is prevalent in PCA when assessed with dedicated tests.
  • Routine neglect screening is recommended for PCA patients due to its impact on daily life.
  • High frequency of right-sided neglect suggests bilateral damage is crucial for its manifestation.