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Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping
Published on: August 12, 2019
Language reorganization in aphasics: an electrical stimulation mapping investigation
Timothy H Lucas1, Daniel L Drane, Carl B Dodrill
1Department of Neurological Surgery, University of Washington, Seattle, Washington 98195, USA. tlucas@u.washington.edu
Neurosurgery
|September 25, 2008
Summary
Brain injury can cause speech deficits, but the brain may reorganize speech function. Earlier injuries lead to greater frontal lobe speech area recruitment, impacting language recovery.
Area of Science:
- Neuroscience
- Neurology
- Speech-Language Pathology
Background:
- Clinical speech deficits following brain injury are common.
- Understanding functional speech reorganization is crucial for patient recovery and treatment planning.
Purpose of the Study:
- To investigate the association between clinical speech deficits after brain injury and functional speech reorganization.
- To explore age-dependent patterns of speech area recruitment in patients with aphasia.
Main Methods:
- Language mapping was performed on 11 patients with speech deficits (aphasics) and 14 control patients over 18 years.
- Neuroanatomic data were correlated with quantitative language profiles and clinical variables.
Main Results:
- Patients with aphasia showed cortical lesions near speech areas and distinct speech site distributions compared to controls.
- A higher proportion of frontal speech sites was observed in brain-injured patients, with earlier injuries correlating with greater frontal recruitment.
- The number of speech sites remained constant, but lesion proximity to temporal speech areas impacted naming fluency.
Conclusions:
- Functional speech reorganization, particularly frontal lobe recruitment, is age-dependent in patients with aphasia.
- Lesion proximity to temporal speech sites influences speech representation and naming fluency.
- Findings inform neurosurgical planning for patients with preoperative speech deficits.
