Deterioration of visual-perceptual organization ability in Alzheimer's disease.

Deterioration of visual-perceptual organization ability in Alzheimer's disease. Research Abstract Details 

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Deterioration of visual-perceptual organization ability in Alzheimer's disease. Abstract Text:

Jessica L Paxton,Guerry M Peavy,Cecily Jenkins,Valerie A Rice,William C Heindel,David P Salmon,

Although deterioration of higher-order visual information processing abilities occurs in Alzheimer's disease (AD), few cross-sectional or longitudinal studies have systematically examined this deficit. The performance of 135 patients with probable AD and 97 matched normal control (NC) participants were compared on a structured test of perceptual organization ability, the Hooper Visual Organization Test (VOT). Both the standard VOT score and a derived score that corrected for anomia were significantly lower for AD patients than for NC participants, but neither score was particularly effective at distinguishing between the groups. The derived VOT score proved to be a more effective measure of visuospatial functioning than the standard VOT score as it loaded with other visuospatial tests in a principal components analysis while the standard score loaded with language tests. The VOT was sensitive to severity of dementia in the AD patients. Longitudinal assessment of 37 of the AD patients and 46 NC participants revealed significant decline over one year in the VOT scores of AD patients, but not in those of NC participants. These results indicate that higher-order visual information processing is impaired in patients with AD and gradually deteriorates with disease progression. This deficit may not be a particularly salient early marker of the disease, but it may be useful in tracking disease course.

Deterioration of visual-perceptual organization ability in Alzheimer's disease. Publishing Authors By Initials

JL Paxton,GM Peavy,C Jenkins,VA Rice,WC Heindel,DP Salmon,

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Deterioration of visual-perceptual organization ability in Alzheimer's disease. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Cortex; a journal devoted to the study of the nerv

VOLUME: 43

Page Numbers: 967-75

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ISSN: 0010-9452

DAY: 28

MONTH: Oct

YEAR: 2007

Deterioration of visual-perceptual organization ability in Alzheimer's disease. Information

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LANGUAGE: eng

NlmUniqueID: 100725

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Grant and Affiliation Information for Deterioration of visual-perceptual organization ability in Alzheimer's disease.

AFFILIATION: Department of Psychology, Washington University, Saint Louis, MO, USA.

Country: Italy

AGENCY: United States NIA

GRANT: AG-12963

ACRONYM: AG

MEDLINETA: Cortex

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