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An overview on Primary Progressive Aphasia and its variants
Serena Amici1, Maria Luisa Gorno-Tempini, Jennifer M Ogar
1Memory and Aging Center, Department of Neurology, University of California, San Francisco, USA. samici@memory.ucsf.edu
Behavioural Neurology
|July 29, 2006
Summary
Primary Progressive Aphasia (PPA) involves language decline. This study reviews PPA variants, finding semantic dementia distinct, while other types overlap, often affecting the left perisylvian region.
Area of Science:
- Neurology
- Linguistics
- Neuroscience
Background:
- Primary Progressive Aphasia (PPA) is a neurodegenerative disorder.
- Characterized by progressive isolated language impairment.
- Defined by Mesulam, with variants including PNFA, SD, and LPA.
Purpose of the Study:
- Review literature on PPA.
- Analyze neuropsychological and neuroradiologic profiles of 42 PPA patients.
- Differentiate clinical and pathogenetic features of PPA variants.
Main Methods:
- Literature review.
- Neuropsychological assessment of 42 PPA patients.
- Neuroradiologic analysis.
Main Results:
- Semantic Dementia (SD) shows a distinct impairment pattern.
- Progressive Nonfluent Aphasia (PNFA) and Logopenic Progressive Aphasia (LPA) exhibit cognitive overlap.
- Neuroimaging reveals left perisylvian region involvement in PPA patients.
Conclusions:
- A multi-faceted approach (cognitive, neuroimaging, pathological) is crucial.
- Understanding PPA variants requires integrated diagnostic methods.
- Further research needed to clarify PPA subtypes and underlying mechanisms.
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