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Korean Journal of Psychology: General

Differential Deficits in Executive Function in Elderly Stroke Patients

Korean Journal of Psychology: General / Korean Journal of Psychology: General, (P)1229-067X; (E)2734-1127
2009, v.28 no.1, pp.29-48


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Abstract

The goal of the present study was to investigate whether elderly stroke patients show differential deficit in executive function relative to other cognitive functions. To this end, we compared cognitive functions of 31 elderly stroke patients and 31 normal elderly subjects. The stroke patients were sampled from nursing hospitals for elderly persons and the normal older adults were sampled from the local community. Cognition Scale for Older Adults(CSOA) was used to measure executive and other cognitive functions. The study yielded three main findings. First, the stroke patients showed greater deficits in Executive IQ than in Basic IQ. Second, the stroke patients performed more poorly on tasks that demand executive processing than on tasks that do not demand executive processing. This differential performance was confirmed in cognitive tasks of attention, working memory, language, and visuospatial function. Third, the stroke patients were classified into normal, mild cognitive impairment, and dementia subgroups, based on their MMSE-KI scores. Each subgroup showed greater deficits in Executive IQ than in Basic IQ. Diagnostic indices indicated that only 10% of the stroke patients have normal executive function. These results indicate that most stroke patients have more severe deficits in executive function relative to other cognitive functions. High prevalence of executive dysfunction among stroke patients may reflect high incidence of subcortical small-vessel infarcts.

keywords
뇌졸중, 치매, 관리기능, 실행기능, 전두엽, stroke, dementia, executive function, neuropsychological function, stroke, dementia, executive function, neuropsychological function

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Korean Journal of Psychology: General