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Related Concept Videos

Visual Agnosia01:12

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...

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Related Experiment Video

Updated: Jul 18, 2026

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

What do eye-fixation patterns tell us about unilateral spatial neglect?

Sumio Ishiai1

  • 1Department of Rehabilitation, Sapporo Medical University, School of Medicine, Sapporo, Japan. ishiai@sapmed.ac.jp

Restorative Neurology and Neuroscience
|November 23, 2006
PubMed
Summary

Patients with unilateral spatial neglect rarely search leftward during line bisection. Their fixation patterns reveal a right-sided bias, impacting visuospatial processing and line representation.

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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

Related Experiment Videos

Last Updated: Jul 18, 2026

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

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
07:12

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

Published on: April 11, 2025

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Ophthalmology

Background:

  • Eye-fixation patterns, including searching and fixation, are crucial for visuospatial processing.
  • Unilateral spatial neglect significantly impairs attention and perception, particularly in one visual field.

Purpose of the Study:

  • To review 18 years of research on eye-fixation patterns in patients with neglect.
  • To elucidate the visuospatial processing mechanisms underlying unilateral spatial neglect through line bisection tasks.

Main Methods:

  • Recording eye-fixation patterns during line bisection tasks in patients with neglect.
  • Utilizing modified line bisection tasks on a touch-panel display to assess representational imagery.

Main Results:

  • Patients with neglect exhibit minimal leftward searching when bisecting lines.
  • Fixation predominantly occurs on the right side, influencing the perceived midpoint.
  • The subjective midpoint estimation is strongly dependent on the right endpoint's spatial location.

Conclusions:

  • The representational image of a line in neglect patients is based on the attended segment from the right endpoint to the fixation point.
  • Combining line bisection with eye-fixation recording enhances understanding of neglect mechanisms.