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Behavioural Neurology
Volume 8 (1995), Issue 2, Pages 121-124
http://dx.doi.org/10.3233/BEN-1995-8208

A Crossed Kana Agraphia

K. Abe,1,3 R. Yokoyama,2 and T. Yanagihara1

1Department of Neurology, Osaka University Medical School, Osaka, Japan
2Division of Speech Therapy, Kishiwada Tokushukai Hospital, Osaka, Japan
3Department of Neurology, Osaka University Hospital, 2-2 Yamadaoka, Suita, Osaka 565, Japan

Received 6 March 1995; Accepted 10 July 1995

Copyright © 1995 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We report a right-handed man who developed selective Kana (phonogram) agraphia following an infarct in the non-dominant right cerebral hemisphere. His ability for comprehension, reading and writing of Kanji (ideogram) was unaffected. Kana errors consisted of substitution with another letter and the number of target words was well preserved. The lesion responsible for his Kana agraphia included the right Wernicke's area (the posterior one-third or one-half of the superior temporal gyrus) on MRI, but he did not have aphasia. Based on these findings, we conclude that the language function in some dextral people may be partially lateralized to the right cerebral hemisphere.