Beyond memory impairment: cognitive changes in Alzheimer's disease.

Journal Article (Journal Article)

In addition to memory impairment, deficits in other cognitive processes are common in the advanced stages of Alzheimer's disease (AD). The diagnosis of AD does not consider the relative prevalence of deficits in cognitive areas other than memory. We report on the prevalence of aphasia, apraxia, and other cognitive changes in individuals from a large representative sample of elderly Canadians. The proportion of these symptoms and the relevant neuropsychological test performance were compared in a group of 749 people over 65 years in age with AD and a control group of 563 people without cognitive impairment. Agnosia was less common in both groups than were deficits in complex visuomotor tasks, abstract thinking, aphasia, and constructional defects. The occurrence of all symptoms increased, and levels of performance on relevant neuropsychological tests decreased, with severity of Alzheimer disease. The tests did not, however, distinguish between possible and probable AD. Both these diagnostic groups showed similar levels of performance, which suggests that this distinction is not clinically meaningful.

Full Text

Duke Authors

Cited Authors

  • Helmes, E; Østbye, T

Published Date

  • February 2002

Published In

Volume / Issue

  • 17 / 2

Start / End Page

  • 179 - 193

PubMed ID

  • 14589747

International Standard Serial Number (ISSN)

  • 0887-6177

Digital Object Identifier (DOI)

  • 10.1016/s0887-6177(00)00109-8


  • eng

Conference Location

  • United States