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Updated: Jan 30, 2026
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Utilizing Repetitive Transcranial Magnetic Stimulation to Improve Language Function in Stroke Patients with Chronic Non-fluent Aphasia
Published on: July 2, 2013
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Functional MRI Task Comparison for Language Mapping in Neurosurgical Patients.
Prashin Unadkat1,2, Luca Fumagalli1,3, Laura Rigolo1
1Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
Summary
The Sentence Completion (SC) task is most effective for language lateralization in patients with brain lesions, particularly in posterior language areas. Using multiple fMRI tasks is recommended for comprehensive presurgical planning.
Area of Science:
- Neuroimaging
- Neurosurgery
- Cognitive Neuroscience
Background:
- Functional MRI (fMRI) is crucial for presurgical planning in patients with brain lesions.
- Different fMRI paradigms activate distinct language network components.
Purpose of the Study:
- To optimize clinical fMRI by comparing three language tasks for language lateralization and localization.
- To evaluate task effectiveness in patients with brain lesions.
Main Methods:
- Retrospective analysis of fMRI data from 51 patients with brain lesions.
- Comparison of Antonym Generation, Sentence Completion (SC), and Auditory Naming tasks.
- Assessment of language lateralization, cortical activation in regions-of-interest, and spatial overlap.
Main Results:
- All tasks showed similar effectiveness for anterior language area lateralization.
- The SC task yielded higher laterality indices in posterior language areas and better clinical report agreement.
- Low spatial overlap (Dice coefficients .351-.458) indicated tasks activate different language network components.
Conclusions:
- The SC task is superior for lateralizing posterior language function and shows consistent dominant hemisphere activation.
- The limited spatial overlap among tasks supports using a battery of fMRI tasks for presurgical planning.
- Utilizing multiple tasks aids surgeons in avoiding critical language areas.
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