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 49 free, full-text research articles on human participants. First 3 results:

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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Agnosia for mirror stimuli: a new case report with a small parietal lesion.
 

Author(s): Olivier Martinaud, Nicolas Mirlink, Sandrine Bioux, Evangéline Bliaux, Axel Lebas, Emmanuel Gerardin, Didier Hannequin

Journal: Arch Clin Neuropsychol. 2014 Nov;29(7):724-8.

 

Only seven cases of agnosia for mirror stimuli have been reported, always with an extensive lesion. We report a new case of an agnosia for mirror stimuli due to a circumscribed lesion. An extensive battery of neuropsychological tests and a new experimental procedure to assess visual ...

Last Updated: 16 Oct 2014

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Training-induced recovery of low-level vision followed by mid-level perceptual improvements in developmental object and face agnosia.
 

Author(s): Maria Lev, Sharon Gilaie-Dotan, Dana Gotthilf-Nezri, Oren Yehezkel, Joseph L Brooks, Anat Perry, Shlomo Bentin, Yoram Bonneh, Uri Polat

Journal: Dev Sci. 2015 Jan;18(1):50-64.

 

Long-term deprivation of normal visual inputs can cause perceptual impairments at various levels of visual function, from basic visual acuity deficits, through mid-level deficits such as contour integration and motion coherence, to high-level face and object agnosia. Yet it is unclear ...

Last Updated: 30 Dec 2014

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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 1 free, full-text review articles on human participants. First 3 results:

Implications of olfactory agnosia for understanding sex differences in schizophrenia.
 

Author(s): L Kopala, C Clark

Journal: Schizophr Bull. 1990 ;16(2):255-61.

 

In our studies, 50 percent of the male patients with schizophrenia have an olfactory agnosia. This finding is of interest because the olfactory neuroanatomical network involves brain regions found to be abnormal in patients with schizophrenia, and this olfactory deficit appears to ...

Last Updated: 30 Aug 1990

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Symptoms, Diagnosis, and Treatment

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Clinical Trial Information This information is provided by ClinicalTrials.gov

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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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: 25 Sep 2015

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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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