J Korean Acad Rehabil Med.  2005 Feb;29(1):23-31.

Application of Dual Route Model in Reading Korean Words in the Acquired Dyslexic Patient after Stroke

• Pyun SB
• Jung H
• Nam K
• Kim MO
• Cho K
• Jung J
• Son H

Abstract

OBJECTIVE
To investigate whether the dual route model is applicable to Korean word reading in acquired dyslexia after stroke. METHOD: Sixty-two year old patient with dyslexia after left inferior temporal and occipital lobe infarct was evaluated according to the lexical processing. After evaluation of general cognitive and language function, visual perception, semantic, and lexical stages were assessed. RESULTS: Visual perception was appropriate, and semantic categorization and picture-word matching tasks were 80.6% and 78.6% correct, respectively. Lexical decision task showed no significant differences within word classes, except shorter reaction time in reading words of Korean origin than those of chinese origin (p <0.05). The patient was able to read only 39.8% of tested words, and he could not read all the non-words. Reading of high frequency word was superior (65.4%) to that of low frequency words (10.9%) and semantic errors were not remarkable (p <0.05). CONCLUSION: The patient showed characteristics of recovery from deep to phonologic dyslexia with impairment of grapheme to phoneme conversion (GPC) route. These findings support that dual route model is applicable to Korean word reading.

Keyword

Dyslexia; Reading; Language disorders; Orthographic processing

MeSH Terms

Asian Continental Ancestry Group
Dyslexia
Dyslexia, Acquired
Humans
Language Disorders
Occipital Lobe
Reaction Time
Semantics
Stroke*
Visual Perception