A comparison of the category fluency deficits associated with Alzheimer's and Huntington's disease

Document Type

Article

Abstract

The supermarket verbal fluency test of the Dementia Rating Scale (DRS) was administered to 20 patients with mild Alzheimer's disease (Mi-DAT), 20 patients with moderately severe Alzheimer's disease (Mo-DAT), 20 patients with Huntington's disease (HD), and 40 normal control subjects. The findings confirmed previous reports that Mo-DAT patients retrieved fewer words per category of supermarket items sampled and had a greater propensity to generate category labels (superordinates) than did intact controls. Similar disruptions of the structure of semantic knowledge were also noted in the fluency performances of the Mi-DAT and HD patients. The Mi-DAT patients' tendency to generate few exemplars for each category sampled suggested that a significant disruption in the structure of semantic knowledge occurred even in the earliest stages of DAT. When the present fluency findings for the HD patients were considered with previous reports of linguistic changes in this disorder, it appeared that HD patients' deterioration in semantic knowledge involved associative changes rather than the bottom-up breakdown associated with DAT. © 1989.

Publication Date

1-1-1989

Publication Title

Brain and Language

ISSN

0093934X

E-ISSN

10902155

Volume

37

Issue

3

First Page

500

Last Page

513

PubMed ID

2529947

Digital Object Identifier (DOI)

10.1016/0093-934X(89)90032-1

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