NEUROANATOMY OF READING AND DYSLEXIA

Dyslexia represents a disorder of linguistic systems in the brain, wit h evidence pointing to a deficit in phonologic processing as the most consistent finding in children and adults with dyslexia. Using functio nal MR imaging, it has become possible to localize the component proce sses used in word identification: orthography, phonology, and lexical- semantic processing. Activation of the inferior frontal gyrus region d uring performance of a rhyming task may provide a neural signature for phonologic processing, the core cognitive component in reading and dy slexia.