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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...

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

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Apraxia, Neglect, and Agnosia.

H Branch Coslett

Continuum (Minneapolis, Minn.)

|June 1, 2018

Summary

Understanding higher nervous system disorders like apraxia, neglect, and agnosia is crucial for neurology. These conditions, despite historical interest, have significant clinical implications for patient recovery and diagnosis.

Area of Science:

Neurology
Neuroscience
Cognitive Science

Background:

Disorders of higher nervous system function have historically intrigued neurologists due to their distinct clinical presentations.
Conditions such as apraxia, neglect, and agnosia remain relevant in contemporary neurological practice.

Purpose of the Study:

To review the clinical significance and neuroscientific understanding of higher nervous system disorders.
To emphasize the importance of recognizing and diagnosing apraxia, neglect, and agnosia.

Main Methods:

Review of classic and recent investigations into behavioral neurology.
Synthesis of current understanding of the phenomenology and underlying mechanisms of these disorders.

Main Results:

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Apraxia, often linked to dominant hemisphere damage, is associated with poorer stroke recovery.
Neglect is viewed as a multifaceted disorder involving attention and arousal deficits.
Agnosias encompass a spectrum of impairments, from sensory processing to semantic knowledge access.

Conclusions:

Despite their historical prominence, disorders of higher nervous system function possess significant clinical relevance.
Advancements in neuroscience have deepened our understanding of these conditions and their impact on patients.