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Behavioural Neurology
Volume 25 (2012), Issue 3, Pages 255-272

Acquired Dyslexia in Three Writing Systems: Study of a Portuguese-Japanese Bilingual Aphasic Patient

Mirna Lie Hosogi Senaha1 and Maria Alice de Mattos Pimenta Parente2

1Member of Behavioral and Cognitive Neurology Unit, Department of Neurology, University of São Paulo School of Medicine, São Paulo, Brazil
2Institute of Psychology, Department of Developmental and Personality Psychology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil

Received 16 March 2012; Accepted 16 March 2012

Copyright © 2012 Hindawi Publishing Corporation and the authors. 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.


The Japanese language is represented by two different codes: syllabic and logographic while Portuguese employs an alphabetic writing system. Studies on bilingual Portuguese-Japanese individuals with acquired dyslexia therefore allow an investigation of the interaction between reading strategies and characteristics of three different writing codes. The aim of this study was to examine the differential impact of an acquired brain lesion on the reading of the logographic, syllabic and alphabetic writing systems of a bilingual Portuguese-Japanese aphasic patient (PF). Results showed impaired reading in the logographic system and when reading irregularly spelled Portuguese words but no effects on reading regular words and nonwords in syllabic and alphabetic writing systems. These dissociations are interpreted according to a multi-route cognitive model of reading assuming selective damage in the lexical route can result in acquired dyslexia across at least three different writing codes.