Olfactory function in corticobasal syndrome and frontotemporal dementia.

Archives of Neurology
Matteo PardiniJordan Grafman

Abstract

Formal olfactory testing may be useful as a bedside tool to help differentiate between conditions such as atypical parkinsonism, dementia, and psychiatric conditions. However, the neural basis of olfactory dysfunction, the effect of concurrent cognitive deficits on olfactory testing results, and the exact prevalence of olfactory deficits in populations with corticobasal syndrome (CBS) and the frontal variant of frontotemporal dementia (FTD-FV) are to date unclear. To assess the prevalence and the neural basis of olfactory recognition deficits in patients with a clinical diagnosis of CBS or FTD-FV. Retrospective study of clinical, neuropsychological, and imaging data. National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland. Twenty-five patients with CBS, 22 with FTD-FV, and 12 age-matched control subjects. Results of neuropsychological evaluation, formal olfactory recognition testing (University of Pennsylvania Smell Identification Test [UPSIT]), and voxel-based morphometry analysis of structural magnetic resonance images of the brain. Mean UPSIT percentile scores were 31.6% for the CBS group and 9.5% for the FTD-FV group. The voxel-based morphometry correlations between local g...Continue Reading

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