CT scan studies of aphasia.

CT scan studies of lesion localization in aphasic patients have in general confirmed the traditional locus of damage within the left hemisphere for the major syndromes. Some interesting exceptions have come to light, such as the possible occurrence of global aphasia with a partial lesion (anterior or posterior) of the language zone. The study of correlations in vivo has underlined the importance of considering time since onset in the evaluation of the clinical picture. Description of atypical aphasias associated with subcortical lesions and correlation of lesion site with specific, partial aspects of linguistic impairment are two areas where CT scan studies are increasing our understanding of the language machinery in the brain.