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"PURE" AGRAPHIA AFTER THE LEFT SUBTHALAMOTOMY Morihiro Sugishita 1 , Hirotaro Narabayashi 2 1Department of Neurology, Institute of Brdin Research, School of Medicine, University, of Tokyo 2Department of Neurology, School of Medicine, Juntendo University pp.489-496
Published Date 1974/4/1
DOI https://doi.org/10.11477/mf.1406203542

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  • Abstract
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Another case with "pure" agraphia after stereo-encephalotomy was studied, compairing with the previously reported "pure" agraphia case. (Japan J. Cli. Neurol. 10 : 568-574 1973)

A 57-year-old right handed male underwent the left subthalamotomy for his right hand tremor.

He had severe agraphia, slight consciousness disturbance, slight memory disturbance, minimal naming difficulty and minimal oral camprehension disturbance after the operation. He still showed severe agraphia about one and a half month after the operation, although the other disturbances gradually cleared up. At that time, spontaneous speech, naming and repetition were well preserved. Oral comprehension, reading comprehension, read-ing aloud and copying were not mpaired. Also, agnosia and apraxia were not present. His agra-phic responses were mostly composed of paragra-phias (51%) and no responses (30%), but showed sometimes perseverations (13%). These data showed that his agraphia was mainly due to the disorder in the selection (retrieval) of graphemes.

Outstanding manifestations of the case as com-pared with the previously reported one are as follows:

1) His "pure" agraphia was not transient, as it is still present on 124 th day after the operation.

2) This case showed no constuctional apraxra.

The second left subthalamotomy was done for his recurred tremor on 81 st day after the first operation, but it didn't influence his agraphia. The presumed site of the lesion was lateral to the one of the first operation.

The presumed site of the lesion common to two "pure" agraphia cases is the subthalamic area under the left centre median (CM). It was sug-gested the manifestation of "pure" agraphia might be related to the lesion of the subthalamic area under the left CM and probably to the surrounding area including the inferior part of the left CM.


Copyright © 1974, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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