PMID: 15374221Jul 1, 1995Paper

Disturbed visuo-spatial orientation in the early stage of Alzheimer's dementia

Archives of Gerontology and Geriatrics
J KálmánZ Janka

Abstract

A pilot study was conducted to assess previously unrecognized visuo-spatial disturbances in 45 Alzheimer's demented (AD) patients and 59 control persons all over the age of 65 years, living in the community. The results of the Clock Drawing Test (CDT) revealed high frequency (78%) of deficient performative visuo-spatial skills of mild and moderate demented AD patients. The severity of dementia was found to be a good predictor of the deficit in visuoconstructive performance. The most frequent drawing mistakes were the misplacement of numbers and clock hands, which may relate to dysfunctions of the right inferior parietal cortex. The right-left orientation (RLO) for the own body was not deteriorated in AD patients. However, significantly lower scores for RLO in the mental rotation subtest were found in mild and moderate AD groups. There were large inter-individual differences in the test scores of both demented groups. Thirty-one percent and 49% of the AD patients scored 0 points or within the normal range (more than 4 points), respectively, indicating a pseudofocal onset pattern of the dementia. The results of the CDT and Right-Left Orientation Test (RLOT) with Mental rotation showed significant positive correlation with other c...Continue Reading

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Citations

Dec 13, 2003·Neurobiology of Learning and Memory·Alexandra BourChantal Mathis
Aug 20, 2002·Scandinavian Journal of Psychology·Sonja H Ofte
Mar 21, 2017·Computers in Biology and Medicine·Tao ZhangAlice May-Kuen Wong
Jun 24, 2004·Journal of the American Geriatrics Society·Thomas BodnerW Wolfgang Fleischhacker
Oct 1, 2020·Clinical Linguistics & Phonetics·Veronika VinczeJános Kálmán
Apr 16, 2016·Psychiatry Research·Martha SzekeresYvette Mándi

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