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Category-specific difficulty naming with verbs in Alzheimer's disease
K M Robinson1, M Grossman, T White-Devine
1Department of Neurology, University of Pennsylvania Medical Center, Philadelphia, USA.
Neurology
|July 1, 1996
Summary
Patients with Alzheimer's disease (AD) find naming verbs more challenging than nouns. This difficulty in verb naming is linked to increased semantic errors in AD patients, suggesting distinct conceptual representations.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Linguistics
Background:
- Alzheimer's disease (AD) is a progressive neurodegenerative disorder.
- Language deficits, particularly in verb processing, are common in AD.
- Understanding these specific linguistic challenges is crucial for diagnosis and intervention.
Purpose of the Study:
- To investigate the differential impact of Alzheimer's disease on noun versus verb naming.
- To explore the types of errors made during picture naming in AD patients.
- To correlate naming performance with other cognitive functions.
Main Methods:
- Twenty patients diagnosed with Alzheimer's disease (AD) participated.
- A picture-naming task used frequency-matched noun and verb pairs (homographs/homophones).
- Error analysis categorized naming errors (semantic, descriptive).
Main Results:
- Patients with AD exhibited significantly greater difficulty in naming verbs compared to nouns.
- Semantic and descriptive errors were significantly more frequent for verbs than nouns.
- No selective effects were found when correlating naming with grammatical comprehension or visuoperceptual processing.
Conclusions:
- Verb naming poses a greater challenge than noun naming for individuals with Alzheimer's disease.
- The increased errors in verb naming may stem from differences in the underlying mental representations of verbs versus nouns.
- These findings contribute to understanding the linguistic profile of Alzheimer's disease.