| Balint's syndrome in Alzheimer's disease: visuospatial functions. | |
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MedLine Citation:
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PMID: 2265983 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A subgroup of patients with Alzheimer's disease (AD) developed Balint's syndrome, an uncommon and incompletely understood disorder of visuospatial processing. We characterized the visuospatial features of three AD patients with Balint's syndrome and compared them to three comparably demented AD patients without this syndrome. On visuospatial tasks, the Balint patients were unable to integrate visual stimuli over space. On contrast sensitivity testing, the Balint patients had significantly decreased contrast sensitivities for low spatial frequency gratings (0.5, 1.0 and 2.0 cpd) alternated at 7.5 Hz. Furthermore, the Balint patients had left visual field attentional deficits and normal hemifield P100 visual evoked potentials. In AD, Balint's syndrome involved decreased sensitivity to low spatial frequencies necessary for global visuospatial analysis, a disturbance suggesting damage to the magnocellular visual system in the occipitoparietal association cortex and, possibly, in the optic nerves. |
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Authors:
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M F Mendez; J Turner; G C Gilmore; B Remler; R L Tomsak |
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Publication Detail:
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Type: Case Reports; Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The International journal of neuroscience Volume: 54 ISSN: 0020-7454 ISO Abbreviation: Int. J. Neurosci. Publication Date: 1990 Oct |
Date Detail:
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Created Date: 1991-02-12 Completed Date: 1991-02-12 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0270707 Medline TA: Int J Neurosci Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 339-46 Citation Subset: IM |
Affiliation:
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Department of Neurology, St. Paul-Ramsey Medical Center/University of Minnesota 55101. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aged Alzheimer Disease / complications* Contrast Sensitivity Evoked Potentials, Visual Female Humans Male Middle Aged Space Perception* Syndrome Vision Disorders / complications*, diagnosis Vision Tests Visual Fields Visual Perception* |
| Grant Support | |
ID/Acronym/Agency:
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2P01AG04391/AG/NIA NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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