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Visual Agnosia

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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Eye-Tracking Control to Assess Cognitive Functions in Patients with Amyotrophic Lateral Sclerosis

Eye-Tracking Control to Assess Cognitive Functions in Patients with Amyotrophic Lateral Sclerosis

Published on: October 13, 2016

Cognitive dysfunction 1 year after COVID-19: evidence from eye tracking.

Federico Carbone¹, Laura Zamarian¹, Verena Rass¹

¹Department of Neurology, Medical University of Innsbruck, 6020, Innsbruck, Austria.

Annals of Clinical and Translational Neurology

|October 20, 2022

Summary

Individuals recovering from COVID-19 show persistent cognitive deficits, particularly in frontal lobe function, 12 months post-infection. Inpatient treatment correlated with worse outcomes in these cognitive assessments.

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Area of Science:

Neuroscience
Infectious Diseases
Cognitive Psychology

Background:

Persistent cognitive dysfunction, often termed "brain fog," is a reported sequela of COVID-19.
Understanding the specific neurological underpinnings and long-term effects of COVID-19 on cognition is crucial.

Purpose of the Study:

To assess frontal lobe function 12 months after acute COVID-19 using eye-tracking.
To compare cognitive performance between COVID-19 survivors and healthy controls.
To investigate the impact of disease severity (inpatient vs. outpatient) on cognitive outcomes.

Main Methods:

Cross-sectional study design.
Eye-tracking assessments to evaluate inhibitory cortical control and frontal lobe function.
Comparison of COVID-19 survivors (inpatient and outpatient groups) with age/sex-matched healthy controls.

Main Results:

COVID-19 survivors exhibited significantly more errors across all eye-tracking tasks compared to healthy controls.
Individuals hospitalized for COVID-19 performed worse on cognitive tasks than outpatients and controls.
Impaired inhibitory cortical control was evident in individuals recovered from COVID-19.

Conclusions:

COVID-19 survivors demonstrate persistent deficits in frontal lobe function, specifically impaired inhibitory control.
Disease severity is associated with the degree of post-COVID-19 cognitive sequelae.
These findings highlight the long-term neurological impact of COVID-19 and inform understanding of post-viral cognitive dysfunction.