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Related Experiment Video

Updated: Apr 3, 2026

The 4 Mountains Test: A Short Test of Spatial Memory with High Sensitivity for the Diagnosis of Pre-dementia Alzheimer's Disease
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Altitudinal neglect.

S Z Rapcsak1, C R Cimino, K M Heilman

  • 1Department of Neurology, University of Florida College of Medicine, Gainesville.

Neurology
|February 1, 1988
PubMed
Summary
This summary is machine-generated.

This study reveals that bilateral parietal lobe damage can cause vertical spatial neglect, affecting attention and exploration in the upper and lower visual fields. This challenges previous theories focused solely on horizontal spatial attention.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Clinical Neurology

Background:

  • Hemispatial neglect typically arises from unilateral brain lesions, with attention organized horizontally.
  • Previous research suggests horizontal organization of attentional mechanisms in extrapersonal space.

Observation:

  • A patient with Balint's syndrome due to bilateral parieto-occipital infarctions presented with altitudinal neglect.
  • The patient consistently misjudged vertical rod bisections, favoring the upper half, in both visual and tactile tasks.
  • Visual testing revealed inattention to lower visual field stimuli during simultaneous stimulation.

Findings:

  • Bilateral parietal lobe damage can result in multimodal attentional deficits along the vertical axis.
  • This case demonstrates a vertical dimension of spatial neglect, distinct from horizontal neglect.
  • The findings suggest that the parietal lobes play a crucial role in vertical spatial attention.

Implications:

  • Challenges the prevailing model of horizontal spatial attention organization.
  • Suggests bilateral parietal involvement is critical for vertical spatial awareness.
  • Opens new avenues for understanding and treating spatial neglect disorders.