Agnosia

Common Name(s)

Agnosia

Agnosia is characterized by an inability to recognize and identify objects and/or persons. Symptoms may vary, according to the area of the brain that is affected.  It can be limited to one sensory modality such as vision or hearing; for example, a person may have difficulty in recognizing an object as a cup or identifying a sound as a cough. Agnosia can result from strokes, traumatic brain injury, dementia, a tumor, developmental disorders, overexposure to environmental toxins (e.g., carbon monoxide poisoning), or other neurological conditions. Visual agnosia may also occur in association with other underlying disorders. People with agnosia may retain their cognitive abilities in other areas. Treatment of primary agnosia is symptomatic and supportive; when it is caused by an underlying disorder, treatment of the disorder may reduce symptoms and help prevent further brain damage.
 

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Advocacy and Support Organizations

 

Condition Specific Organizations

Following organizations serve the condition "Agnosia" for support, advocacy or research.

There are currently no organizations listed in Disease InfoSearch that support this condition. Create a listing.

 

 

General Support Organizations

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Scientific Literature

Articles from the PubMed Database

Research articles describe the outcome of a single study. They are the published results of original research.
The terms "Agnosia" returned 44 free, full-text research articles on human participants. First 3 results:

Hurt but still alive: Residual activity in the parahippocampal cortex conditions the recognition of familiar places in a patient with topographic agnosia.
 

Author(s): Mitsouko van Assche, Valeria Kebets, Ursula Lopez, Arnaud Saj, Rachel Goldstein, Françoise Bernasconi, Patrik Vuilleumier, Frédéric Assal

Journal:

 

The parahippocampal cortex (PHC) participates in both perception and memory. However, the way perceptual and memory processes cooperate when we navigate in our everyday life environment remains poorly understood. We studied a stroke patient presenting a brain lesion in the right PHC, ...

Last Updated: 24 Feb 2016

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Emergence delirium with transient associative agnosia and expressive aphasia reversed by flumazenil in a pediatric patient.
 

Author(s): Julie K Drobish, Max B Kelz, Patricia M DiPuppo, Scott D Cook-Sather

Journal: A A Case Rep. 2015 Jun;4(11):148-50.

 

Multiple factors may contribute to the development of emergence delirium in a child. We present the case of a healthy 12-year-old girl who received preoperative midazolam with the desired anxiolytic effect, underwent a brief general anesthetic, and then exhibited postoperative delirium, ...

Last Updated: 3 Jun 2015

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Patient DF's visual brain in action: Visual feedforward control in visual form agnosia.
 

Author(s): Robert L Whitwell, A David Milner, Cristiana Cavina-Pratesi, Masihullah Barat, Melvyn A Goodale

Journal: Vision Res.. 2015 May;110(Pt B):265-76.

 

Patient DF, who developed visual form agnosia following ventral-stream damage, is unable to discriminate the width of objects, performing at chance, for example, when asked to open her thumb and forefinger a matching amount. Remarkably, however, DF adjusts her hand aperture to accommodate ...

Last Updated: 27 Apr 2015

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Reviews from the PubMed Database

Review articles summarize what is currently known about a disease. They discuss research previously published by others.
The terms "Agnosia" returned 0 free, full-text review articles on human participants.

 
 
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Symptoms, Diagnosis, and Treatment

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Clinical Trial Information This information is provided by ClinicalTrials.gov

Lack of Awareness of Symptoms (Anosognosia) in PD: An Observational Study for People With Parkinson's
 

Status: Recruiting

Condition Summary: Parkinson's; Anosognosia

 

Last Updated: 24 Oct 2016

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Anosognosia Evaluation After Cranocerebral Trauma Moderate to Severe
 

Status: Recruiting

Condition Summary: Traumatic Brain Injury

 

Last Updated: 25 Jul 2016

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Processing Integration in Neurological Patients Using fMRI
 

Status: Not yet recruiting

Condition Summary: Acute Inflammatory Demyelinating Polyradiculoneuropathy; Stroke; Anosognosia; Central and Peripheral Neurodegenerative Pathologies; Neuropsychiatric Conditions

 

Last Updated: 28 Mar 2016

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