Multiple component agraphia in a patient with atypical cerebral dominance: an error analysis |
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Authors: | D I Margolin L Binder |
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Institution: | Good Samaritan Hospital and Medical Center, Portland, Oregon, USA;Veteran''s Administration Hospital, Portland, Oregon, USA |
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Abstract: | A 52-year-old man with atypical cerebral dominance (left-handed for writing but mixed handedness for other tasks) suffered an extensive right hemisphere stroke, resulting in a combination of deficits that has not been previously reported. There were profound visual constructive and visual perceptual disturbances and a spatial agraphia, which were consistent with a nondominant hemisphere lesion. There was also a severe apraxic agraphia, which is typically associated with a dominant hemisphere lesion, but no other signs of dominant hemisphere dysfunction such as linguistic disturbance or limb-motor apraxia were present. This case serves to highlight the functional and anatomical relationship between handwriting and other forms of praxis; the various sources of error in letter formation; the need to be specific in labeling and describing agraphias ; and the role of a detailed analysis of writing errors in delineating the neuropsychological processes involved in handwriting. |
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Keywords: | Send requests for reprints to Dr David I Margolin Chief Neurology Section Veterans Administration Hospital 2615 E Clinton Avenue Fresno Calif 93703 |
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