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Japanese

AGRAPHIA FROM THE FRONTAL LESION:A CASE OF MOYAMOYA DISEASE Mutsuko Sato 1 , Nobuyuki Yasui 2 , Akifumi Suzuki 2 , Shingo Kawamura 2 , Ichiro Sayama 2 , Tsunesaburo Kobayashi 3 1Neuropsychological Labolatory, Research Institute for Brain and blood Vessels-AKITA 2Departments of Surgical Neurology, Research Institute for Brain and blood Vessels-AKITA 3Departments of Surgical Neurology, Research Institute for Brain and blood Vessels-AKITA pp.1145-1151
Published Date 1983/11/1
DOI https://doi.org/10.11477/mf.1406205224
  • Abstract
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A 45-year-old woman showed agraphia and de-creasing spontaneity. She was diagnosed as Moya-moya disease by cerebral angiography. CT scans revealed the abnormal low density area in the left frontal lobe, and the regional cerebral blood flow study showed low perfusion in the bilateral frontal lobe and the left high convexity area.

She could copy specimens of the author's writ-ing, but her spontaneous writing and dictation were impaired with either hand. The form of eachletter she wrote was not so distorted, but wrong letters were substituted for the correct ones. Errors in Kana-writing were more common than in Kanji. Although her spontaneous speech was diminished, auditory comprehension, reading and construc-tional abilities were unaffected. She exhibited no agnosia and apraxia.

Agraphia in this case was caused by a discon-nexion between the visual image and auditory image and/or between the visual image and kine-sthetic image. Inner speech (Luria, AR et al, 1968) in this case might be disturbed, and decreasing spontaneity and delay of response resulted from the frontal lesion.

The writing process may be constituted of many factors ; images of visual, auditory and kinesthetic as well as primary functions of sensory and motor. Furthermore, it may be necessary for normal writing that one's inner speech, activeties and intention of writing behavior are intact.


Copyright © 1983, 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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