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Neuropsychologia. 1996 Mar;34(3):195-207.

Examination of the working memory components in normal aging and in dementia of the Alzheimer type.

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Centre de Recherche du Centre Hospitalier Côte-des-Neiges, Montréal, Québec, Canada.


The verbal and attentional components of working memory were examined in patients with Alzheimer's disease, normal elderlies, and young controls. Patients with Alzheimer's disease, showed a reduced span but were sensitive to word length. This is indicative of a functional rehearsal procedure. However, the effect of phonological similarity on immediate recall was smaller in patients with Alzheimer's disease and these patients showed a depressed performance in tasks of phonological analysis. There was also a significant decrement in a task that assessed the attentional component of working memory. Examination of individual patterns of performance showed that the phonological deficiency was severe in a subgroup of patients while the attentional deficit was more general.

[Indexed for MEDLINE]

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