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Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection
07:04

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Published on: March 10, 2021

Visuospatial neglect in action.

Monika Harvey1, Stéphanie Rossit

  • 1School of Psychology, University of Glasgow, Glasgow G12 8QB, Scotland, UK. Monika.Harvey@glasgow.ac.uk

Neuropsychologia
|October 8, 2011
PubMed
Summary
This summary is machine-generated.

Patients with hemispatial neglect show varied visuomotor control. This review reconciles findings by linking action types to distinct brain networks, differentiating online vs. offline actions.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Visuomotor Control

Background:

  • Hemispatial neglect is associated with visuospatial impairments.
  • Previous research on visuomotor control in neglect patients yielded conflicting results.

Purpose of the Study:

  • To reconcile diverging findings on visuomotor control in hemispatial neglect.
  • To differentiate performance based on action types and underlying neuroanatomy.

Main Methods:

  • Review of existing literature on hemispatial neglect and visuomotor control.
  • Analysis of studies differentiating between on-line and off-line actions.
  • Correlation of lesion-symptom mapping with performance deficits.

Main Results:

  • Patients with hemispatial neglect perform target-directed (on-line) tasks relatively well, unlike those with optic ataxia.
  • Deficits in on-line actions after right-brain damage are linked to visuomotor network damage (basal ganglia, frontal, parieto-occipital regions).
  • Neglect-specific deficits appear in off-line actions (e.g., delayed reaches) associated with occipito-temporal and parahippocampal cortex damage.

Conclusions:

  • Different action types rely on distinct cortical networks (dorsal vs. ventral visual streams).
  • On-line actions use egocentric coordinates via the dorsal stream; off-line actions use scene-based coordinates potentially involving the ventral stream.
  • Neuroanatomical differences explain performance variations in visuomotor tasks for patients with hemispatial neglect.