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Neural basis for verb processing in Alzheimer's disease: an fMRI study
Murray Grossman1, Phyllis Koenig, Chris DeVita
1Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-4283, USA. mgrossma@mail.med.upenn.edu
Neuropsychology
|November 6, 2003
Summary
Alzheimer's disease (AD) patients show impaired verb understanding due to altered brain activation. Functional MRI reveals reduced neural activity in key language areas, especially for motion verbs, impacting communication.
Area of Science:
- Neuroscience
- Neurology
- Cognitive Science
Background:
- Patients with probable Alzheimer's disease (AD) exhibit deficits in verb comprehension.
- Understanding the neural underpinnings of these linguistic challenges is crucial for AD research.
Purpose of the Study:
- To investigate the neural basis of impaired verb processing in Alzheimer's disease (AD).
- To compare brain activation patterns during verb tasks in AD patients and healthy seniors.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed to examine neural activation.
- Participants (11 AD patients, 16 healthy seniors) judged the pleasantness of verbs (MOTION and COGNITION).
Main Results:
- Both groups activated temporal and frontal regions for verb processing.
- AD patients showed reduced and altered activation compared to controls, particularly for MOTION verbs.
- Minimal activation was observed in AD patients for COGNITION verbs.
Conclusions:
- Altered activation within the neural network supporting verb processing contributes to linguistic deficits in AD.
- These findings highlight specific neural network disruptions in Alzheimer's disease affecting language.