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Defect in the expression and comprehension of words, caused by damage to the frontal and temporal lobes of the brain. It can result from head trauma, tumour, stroke, or infection. Symptoms vary with the brain area involved, and the ability to put words in a meaningful order may be lost. Speech therapy may be useful. In some cases, improvement may be due to assumption of some language functions by other areas of the brain.
Variants of APHASIA
aphasia or dysphasia
This entry comes from Encyclopædia Britannica Concise. For the full entry on aphasia, visit Britannica.com.