期刊
NEUROPSYCHOLOGY
卷 20, 期 3, 页码 319-335出版社
AMER PSYCHOLOGICAL ASSOC/EDUCATIONAL PUBLISHING FOUNDATION
DOI: 10.1037/0894-4105.20.3.319
关键词
semantic memory; frontortemporal dementia; comprehension impairment; visual processing impairments; cognitive assessment measures
资金
- Alzheimers Research UK [ART-PhD2004-2] Funding Source: researchfish
- Medical Research Council [MC_U105559861, MC_U105579219] Funding Source: researchfish
- Medical Research Council [MC_U105559861, MC_U105579219] Funding Source: Medline
- MRC [MC_U105559861, MC_U105579219] Funding Source: UKRI
Using semantic dementia (SD) as a reference point, the authors assessed semantic memory in four other neurodegenerative disorders: progressive nonfluent aphasia (PNFA), frontal variant frontotemporal dementia (fvFrD), Alzheimer's disease (AD), and posterior cortical atrophy (PCA). Individuals with SD were more impaired than other groups on semantic measures and showed a characteristic pattern across tasks: category fluency (CF) worse than letter fluency (LF), naming worse than comprehension, and visual and verbal comprehension equally affected, suggesting disruption to an amodal semantic system. Individuals with AD demonstrated a similar pattern to a milder degree. Although PNFA, fvFTD, and PCA groups had abnormal scores (relative to controls) on most semantic measures, their differing patterns across measures indicate that the apparent semantic impairment in these conditions is largely secondary to other factors.
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