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A CASE OF ALEXIA WITH AGRAPHIA FOLLOWING LEFT OCCIPITAL LOBE Mutsuko Sato 1 , Yoko Yamamoto 1 , Shigeru Shimazaki 2,4 , Kazuo Watanabe 3 1Divisions of Neuropsychology, Southern Tohoku Research Institute for Neuroscience 2Divisions of Neurology, Southern Tohoku Research Institute for Neuroscience 3Divisions of Neurosurgery, Southern Tohoku Research Institute for Neuroscience 4Present Address : Department of Neurology, Tohoku University School of Medicine pp.215-220
Published Date 1987/3/1
DOI https://doi.org/10.11477/mf.1406205867
  • Abstract
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Since Dejerine reported cases of alexia with agraphia in 1891 and of pure alexia in 1892, it is generally said that the former may occur due to the lesion of the left angular gyrus and the lat-ter due to that of the medial inferior area of the left occipital lobe. In this article, we reported a case of alexia with agraphia who had the main lesion in the medial inferior area of the occipital lobe of the left hemisphere.

A 62-year-old right-handed male showed alexia with agraphia. CT scan and single photon emis-sion CT revealed the main lesion in the medial occipital area on the left side. Alexia with agra-phia of the patient was characterized as follows: with regard to reading, though his recognition of forms as letter was nearly spared, he could nei-ther read letters or words nor differentiate Kana-from Kanji-letters. Paralexic errors included con-fusion of Kana and Kanji. He manifested no kine-sthetic facilitation in reading. Regarding writing, his disturbances were more severe in Kanji-writing, but there were paragraphia and difficulty of letter-form evocation even in Kana-writing. He could not write spontaneously or to dictation. His copy-ing of letters was also disturbed. Since it is said that there is no difference between Kana- and Kanji-disturbance in Japanese pure alexics, an as-pect of alexia of the patient may be common to pure alexia. On the other hand, with an aspect of agraphia, it is speculated that agraphia may be followed by a kind of disconnection among as-sociations such as visual image of letters, auditory image of words and kinesthetic image of writing in either alexia with agraphia or pure alexia. Then, agraphia of the patient might be caused by disconnection between visual image and kinesthetic image, or disruption of these images. Consequently, pure alexia might combine alexia with agraphia in the present case.


Copyright © 1987, 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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