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Allocentric spatial neglect with posterior cortical atrophy.

Eduardo M Zilli1, Kenneth M Heilman

  • 1a Department of Neurology and Center for Neuropsychological Studies , University of Florida College of Medicine , Gainesville , FL 32610-023 , USA.

Neurocase
|April 1, 2014
PubMed
Summary
This summary is machine-generated.

Patients with posterior cortical atrophy (PCA) experience visual neglect. This study details a PCA patient with allocentric visual neglect, linked to left parietal atrophy, suggesting new insights into spatial attention disorders.

Keywords:
allocentric neglectegocentric neglectfocal and global attentionposterior cortical atrophyvisual processing systems

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Neurology

Background:

  • Posterior cortical atrophy (PCA) is a neurodegenerative syndrome.
  • Patients with PCA often exhibit egocentric spatial neglect.
  • Understanding allocentric neglect in PCA is crucial for diagnosis.

Observation:

  • This report details a unique case of a woman with PCA.
  • She presented with right-sided stimulus-based allocentric visual neglect.
  • Impairments were noted in cancellation, reading, and drawing tasks.

Findings:

  • Brain imaging revealed left parietal atrophy in the patient.
  • This suggests a potential link between parietal lobe function and allocentric neglect.
  • The findings challenge previous assumptions about neglect in PCA.

Implications:

  • The pathophysiology may involve disrupted ventral ('what') and dorsal ('where') stream interaction.
  • Deficits in allocating contralateral focal attention are also considered.
  • Further research is needed to elucidate mechanisms and guide treatment for PCA-related visual neglect.