This paper describes a novel approach to the simulation of language disorders, based upon the notion of a multi-network architecture—a set of autonomous neural networks which have been linked in some manner to perform a complex function that cannot readily be performed by any one network alone. The merits of this approach have been assessed by mapping a neuropsychological model of single-word l...

OBJECTIVE To aid health professionals, especially pediatricians, in the diagnosis and prevention of language and learning disorders. SOURCES OF DATA Review of the relevant literature published in the past 5 years (MEDLINE and textbooks). SUMMARY OF THE FINDINGS Multiple variables, among them neurological diseases, may be related to the etiology of language and learning disorders. CONCLUSI...

Post-stroke language disorders are frequent and include aphasia, alexia, agraphia and acalculia. There are different definitions of aphasias, but the most widely accepted neurologic and/or neuropsychological definition is that aphasia is a loss or impairment of verbal communication, which occurs as a consequence of brain dysfunction. It manifests as impairment of almost all verbal abilities, e....