Symptoms of conduction aphasia
What are the clinical features of conduction aphasia and where is the lesion that produces it?
Conduction aphasia is a fluent aphasia, with good comprehension, poor repetition, paragrammatic errors, anomia, paraphasic errors, good recitation, and good reading aloud.
While any type of paraphasia may be seen, the vast majority of substitutions involves phonemes resulting in literal (phonemic) paraphasic errors.
The lesion usually involves the left inferior parietal lobule, especially the anterior supramarginal gyrus.
Often the lesion is in the subcortical white matter, deep to the inferior parietal cortex, involving the arcuate fasciculus or the extreme capsule immediately below it.
Both structures are connected to the temporal and frontal cortex.
