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A longitudinal study of language decline in Alzheimer's disease and frontotemporal dementia

Published online by Cambridge University Press:  02 February 2007

MERVIN BLAIR ,
CECILE A. MARCZINSKI ,
NICOLE DAVIS-FAROQUE  and
ANDREW KERTESZ
MERVIN BLAIR
Affiliation:
Department of Cognitive Neurology, St. Joseph's Health Care, London, Ontario, Canada
CECILE A. MARCZINSKI
Affiliation:
Department of Psychology, University of Kentucky, Lexington, Kentucky.
NICOLE DAVIS-FAROQUE
Affiliation:
Department of Cognitive Neurology, St. Joseph's Health Care, London, Ontario, Canada
ANDREW KERTESZ
Affiliation:
Department of Cognitive Neurology, St. Joseph's Health Care, London, Ontario, Canada
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Abstract

Language decline is usually the fastest and predominant change in primary progressive aphasia (PPA). In Alzheimer's disease (AD), it is usually associated with global cognitive deficits. Decreased speech output, reduced conversational initiation, echolalia, and changes in the pragmatics of conversation are seen in the behavioral variant of frontotemporal dementia (FTD-bv), however, the evolution of language disturbance in FTD-bv patients is rarely examined systematically with a standardized language battery. We aimed to longitudinally track the nature of language change in FTD-bv, PPA, and AD using a standardized measure of language functioning. We also explored the nature of language deficits between semantic dementia (SD) patients and the fluent subgroup of PPA patients. The Western Aphasia Battery was administered to 105 AD, 20 FTD-bv, 54 PPA, and 10 SD patients on 2 occasions with approximately 1 year between assessments. Ninety-nine of these patients were examined an additional year. FTD-bv and PPA patients showed a faster language decline than AD patients. The eventual overlap in language functioning in FTD-bv and PPA suggests that these syndromes belong to the same spectrum of disorders. In conclusion, longitudinal language assessment provides us with a unique understanding of the evolution and progression of language deterioration in various dementias. (JINS, 2007, 13, 237–245.)

Keywords

Frontotemporal lobar degenerationPrimary progressive aphasiaProgressive nonfluent aphasiaSemantic dementiaAlzheimer's type dementiaWestern Aphasia Battery
Type
Research Article
Information
Journal of the International Neuropsychological Society , Volume 13 , Issue 2 , March 2007 , pp. 237 - 245
Copyright
© 2007 The International Neuropsychological Society

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