Reversed hemispheric organization in a lefthander.
For left-handers, cognitive functions are organized in the brain similarly to right-handers or they are more diffusely represented. In this study, we report a left-handed patient with a focal right temporal-parietal lesion who evidenced a lasting Wernicke's aphasia and visual-spatial functioning typical of a right-hander with left-hemisphere in involvement. The patient's performance on other tasks (e.g. praxis, singing) as well as observed behavioral changes also resembled those of a right-hander with left-hemisphere compromise. This case suggests that it is possible for cognitive functions to be inversely represented in the two hemispheres.
D000368:Aged; D001037:Aphasia / Q000503:physiopathology*; D001041:Aphasia, Wernicke / Q000503:physiopathology* / Q000523:psychology; D001072:Apraxias / Q000503:physiopathology; D001921:Brain / Q000503:physiopathology*; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D007802:Language; D008297:Male; D010296:Parietal Lobe / Q000000981:diagnostic imaging / Q000503:physiopathology; D011597:Psychomotor Performance / Q000502:physiology; D011859:Radiography; D013702:Temporal Lobe / Q000000981:diagnostic imaging / Q000503:physiopathology