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Related Experiment Video

Updated: Jul 2, 2025

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection
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Neglecting the bottom space: an object-based disorder? A two-case observational study.

Jennifer Martin1, Patrik Vuilleumier2,3, Frédéric Assal1,3

  • 1Department of Clinical Neurosciences, University Hospitals of Geneva, Geneva, Switzerland.

Neurocase
|February 26, 2024
PubMed
Summary
This summary is machine-generated.

Altitudinal neglect, a form of spatial neglect affecting vertical space, may primarily manifest as an allocentric deficit. This suggests spatial attention mechanisms operate in vertical dimensions, impacting patient rehabilitation.

Keywords:
Spatial neglectallocentric and egocentric referencealtitudinal neglectspatial processingstroke

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Altitudinal neglect is an atypical spatial neglect affecting vertical space, with limited understanding of its reference frame characteristics.
  • Spatial neglect typically involves horizontal space and is studied across egocentric and allocentric frames.

Purpose of the Study:

  • To investigate the reference frames (egocentric vs. allocentric) and spatial extents (peripersonal vs. extrapersonal) of altitudinal neglect.
  • To characterize altitudinal neglect in patients with acute stroke.

Main Methods:

  • Evaluated two patients with acute stroke and bottom altitudinal neglect within 10 days post-stroke.
  • Assessed altitudinal neglect and unilateral spatial neglect (USN) in peripersonal and extrapersonal space, distinguishing egocentric and allocentric signs.
  • Compared patient performance to 15 healthy age-matched controls.

Main Results:

  • Patients exhibited allocentric and egocentric left USN in peripersonal space.
  • Altitudinal neglect signs were predominantly allocentric.
  • No neglect was observed in extrapersonal space.

Conclusions:

  • Altitudinal neglect may represent an allocentric form of spatial neglect.
  • Allocentric representations appear crucial for attentional deployment in both horizontal and vertical dimensions.
  • Further research is needed to elucidate brain mechanisms and clinical implications.