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Updated: Aug 2, 2026
10:15
Utilizing Repetitive Transcranial Magnetic Stimulation to Improve Language Function in Stroke Patients with Chronic Non-fluent Aphasia
Published on: July 2, 2013
Language processing in aphasia: changes in lateralization patterns during recovery reflect cerebral plasticity in
C Thomas1, E Altenmüller, G Marckmann
1Department of Neurology, University of Tübingen, Germany.
Electroencephalography and Clinical Neurophysiology
|February 1, 1997
Summary
Cortical DC-potential lateralization reliably assesses language dominance. In aphasia recovery, patterns shift, indicating right-hemisphere involvement and distinct recovery mechanisms for Broca
Area of Science:
- Neuroscience
- Neurolinguistics
- Cognitive Neurology
Background:
- Cortical direct current (DC)-potential lateralization is a robust method for assessing language dominance in healthy individuals and those with transient aphasia.
- Understanding the neural basis of aphasia recovery is crucial for developing effective therapeutic strategies.
Purpose of the Study:
- To investigate changes in cortical DC-potential lateralization patterns during language processing in stroke patients with permanent aphasia.
- To explore the role of right-hemispheric involvement in compensatory mechanisms and recovery from aphasia.
- To differentiate recovery patterns in Broca's aphasia versus Wernicke's aphasia.
Main Methods:
- Assessment of cortical DC-potential lateralization during single-word processing in stroke patients with permanent aphasia.
- Non-invasive recording of electrophysiological data with high temporal resolution.
- Correlation of lateralization pattern changes with clinical recovery and aphasia type.
Main Results:
- In stroke patients with permanent aphasia, the typical left-dominant DC-negativity shifted to bilateral activation, suggesting right-hemispheric compensatory involvement.
- Broca's aphasia showed a shift from right-hemispheric preponderance to left frontal lateralization with recovery.
- Wernicke's aphasia exhibited a persistent shift towards right-hemispheric dominance, even after clinical recovery.
Conclusions:
- Changes in cortical DC-potential lateralization reflect distinct neural mechanisms underlying aphasia recovery, potentially involving contralateral disinhibition and synaptic modulation.
- Lateralization patterns offer insights into the dynamic neural reorganization following stroke-induced aphasia.
- Cortical DC-potential assessment provides a valuable, non-invasive tool for studying the neural basis of language recovery.
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