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Conduction aphasia elicited by stimulation of the left posterior superior temporal gyrus
1Department of Neurology, University of Virginia, Charlottesville 22908, USA. quigg@virginia.edu
Journal of Neurology, Neurosurgery, and Psychiatry
|March 20, 1999
Abstract
Objective:
Disruption of fascicular tracts that connect Wernicke's to Broca's areas is the classic mechanism of conduction aphasia. Later work has emphasised cortical mechanisms.
Methods:
To determine the distribution of language on dominant cortex, electrical cortical stimulation was performed using implanted subdural electrodes during brain mapping before epilepsy surgery.
Results:
A transient, isolated deficit in repetition was elicited with stimulation of the posterior portion of the dominant superior temporal gyrus.
Conclusion:
This finding suggests that cortical dysfunction, not just white matter disruption, can induce conduction aphasia.