ABSTRACT
Crossed aphasia refers to language disturbance induced by unilateral right hemisphere (non-language dominant) injury in right-handed people who had no previous history of brain damage. Crossed aphasia occurs in less than 2 percent who developed a aphasia. We report a case of a 49-year-old right handed man with language disturbance after right middle cerebral infarction. He showed nonfluent crossed aphasia with Gerstman syndrome such as right-left disorientation, finger agnosia, acalculia and agraphia, but not with apraxia and neglect. At 7 weeks after onset, language function indicated improvement in spontaneous speech and at 19 weeks after onset, improvement in spontaneous speech, comprehension, repetition, naming and reading.
Subject(s)
Humans , Middle Aged , Agnosia , Agraphia , Aphasia , Apraxias , Brain , Cerebral Infarction , Comprehension , Dyscalculia , Hand , Infarction, Middle Cerebral ArteryABSTRACT
"Mirror-writing" is the simultaneous process of reversing individual letters and composing word strings in reverse direction. It is reported that the lesions which cause "mirror-writing" are left parietal lobe, left basal ganglia, right supplementary motor area, left supplementary motor area, left cingulate gyrus, and left angular gyrus. To explain this phenomenon, several theories have been proposed such as the motor, the visual dominance, the supplementary motor area, the visio-spatial, the visual word- form, the hemisaptial factor or directional and the reflected graphemic representation hypotheses. With reviewing some of literatures, we present a case of "mirror- writing" of posterior corpus callosum lesion which is not included in the aforementioned those.