Semantic Dementia Versus Nonfluent Progressive Aphasia
Autor: | Karalyn Patterson, Jonathan A. Knibb, John R. Hodges, Maria Teresa Carthery-Goulart |
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Rok vydání: | 2012 |
Předmět: |
medicine.medical_specialty
Clinical Dementia Rating Semantic dementia Aphasiology Neuropsychological Tests Audiology Progressive nonfluent aphasia Alzheimer Disease Memory Aphasia medicine Humans Dementia Primary Progressive Nonfluent Aphasia Aged Working memory Neuropsychology Middle Aged medicine.disease Semantics Psychiatry and Mental health Clinical Psychology Frontotemporal Lobar Degeneration Geriatrics and Gerontology medicine.symptom Cognition Disorders Comprehension Psychology Gerontology Cognitive psychology |
Zdroj: | Alzheimer Disease & Associated Disorders. 26:36-43 |
ISSN: | 0893-0341 |
Popis: | Background Early progressive nonfluent aphasia (PNFA) may be difficult to differentiate from semantic dementia (SD) in a nonspecialist setting. There are descriptions of the clinical and neuropsychological profiles of patients with PNFA and SD but few systematic comparisons. Method We compared the performance of groups with SD (n=27) and PNFA (n=16) with comparable ages, education, disease duration, and severity of dementia as measured by the Clinical Dementia Rating Scale on a comprehensive neuropsychological battery. Principal components analysis and intergroup comparisons were used. Results A 5-factor solution accounted for 78.4% of the total variance with good separation of neuropsychological variables. As expected, both groups were anomic with preserved visuospatial function and mental speed. Patients with SD had lower scores on comprehension-based semantic tests and better performance on verbal working memory and phonological processing tasks. The opposite pattern was found in the PNFA group. Conclusions Neuropsychological tests that examine verbal and nonverbal semantic associations, verbal working memory, and phonological processing are the most helpful for distinguishing between PNFA and SD. |
Databáze: | OpenAIRE |
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