Speech output is fluent but paraphasic, comprehension of spoken language is intact, and repetition is severely impaired, as are naming and writing. Lesion spares, but functionally disconnects, Wernicke's and Broca's areas. Most cases are embolic, involving supramarginal gyrus of dominant parietal lobe, dominant superior temporal lobe, or arcuate fasciculus.
Section 3. Common Patient Presentations