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Related Experiment Video

Updated: Jun 12, 2026

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

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

Published on: April 11, 2025

Modelling visual neglect: computational insights into conscious perception.

Linda J Lanyon¹, Susan L Denham

¹Human Vision and Eye Movement Laboratory, Department of Ophthalmology and Visual Science, University of British Columbia, Vancouver, British Columbia, Canada. llanyon@eyecarecentre.org

|June 19, 2010

Summary

This summary is machine-generated.

Computational models reveal that parietal lesions cause visual neglect and inhibition of return deficits. Frontal lesions result in milder neglect but more severe inhibition of return and perseveration issues.

More Related Videos

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

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

Published on: March 10, 2021

Related Experiment Videos

Last Updated: Jun 12, 2026

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

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

Published on: April 11, 2025

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

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

Published on: March 10, 2021

Area of Science:

Neuroscience
Computational modeling
Cognitive psychology

Background:

Visual neglect is an attentional deficit often caused by parietal or frontal cortex lesions.
Patients with visual neglect fail to attend to stimuli in the visual hemifield opposite their lesion.

Purpose of the Study:

To investigate the effects of parietal and frontal lesions on visual attention and search using a computational model.
To simulate visual search behavior under lesion conditions and analyze resulting attentional deficits.

Main Methods:

Utilized an existing computational model of visual attention and search.
Simulated unilateral parietal and frontal lesions to observe effects on search scan paths.
Analyzed model activity in the extrastriate ventral stream during simulated neglect.

Main Results:

Unilateral parietal lesions in the model induced visual neglect symptoms and inhibition of return (IOR) deficits.
Frontal lesions caused milder neglect but more pronounced IOR deficits and perseveration.
Simulated parietal lesions showed reduced extrastriate ventral stream activity for neglected hemifield stimuli.

Conclusions:

Parietal lesions impact visual search by affecting attentional mechanisms, potentially correlating with altered perception.
Frontal lesions present distinct patterns of neglect, IOR deficits, and perseveration.
Interconnections between dorsal and ventral visual streams are proposed as crucial for understanding perceptual deficits and conscious perception.