title: [Alexia without agraphia, right homonymous hemianopsia, and color anomia. Report of four cases with location of the lesion by computerized axial tomography of the brain (author's transl)].
abstract: Two patients with left occipitotemporal hematomas and another two with ischemic lesions in the territory of the left posterior cerebral artery presented alexia without agraphia, right homonymous hemianopsia, and a disturbance in the naming of colors. The etiology and the location of the lesion was demonstrated by computerized axial tomography in all four cases. After a period of follow-up of more than one year a good evolution was substantiated in the patients with hematoma. The mechanisms underlying the appearance of symptoms are discussed, and a comment is made on the importance of the splenium of the corpus callosum in the transfer of visual impulses, with the dissociations appearing in the disconnection syndromes due to lesions at this level.
mesh_terms: D000849:Anomia / Q000209:etiology*; D001037:Aphasia / Q000209:etiology*; D001921:Brain / Q000000981:diagnostic imaging; D002545:Brain Ischemia / Q000150:complications*; D002543:Cerebral Hemorrhage / Q000150:complications*; D003116:Color; D003337:Corpus Callosum / Q000473:pathology; D004411:Dyslexia, Acquired / Q000209:etiology*; D006406:Hematoma / Q000150:complications; D006423:Hemianopsia / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed; D014795:Visual Pathways
vernacular_title: Alexia sin agrafia, hemianopsia homónima derecha y anomia de colores. A propósito de cuatro observaciones con topografía conocida mediante TAC craneal.