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Hanja alexia with agraphia after left posterior inferior temporal lobe infarction: A case study

Authors
 Jay C. Kwon  ;  Hyun Jeong Lee  ;  Juhee Chin  ;  Young Mi Lee  ;  Hyanghee Kim  ;  Duk L. Na 
Citation
 JOURNAL OF KOREAN MEDICAL SCIENCE, Vol.17(1) : 91-95, 2002 
Journal Title
JOURNAL OF KOREAN MEDICAL SCIENCE
ISSN
 1011-8934 
Issue Date
2002
MeSH
Cerebral Infarction/complications* ; Cerebral Infarction/diagnostic imaging ; Dyslexia/etiology* ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Radiography ; Task Performance and Analysis ; Temporal Lobe/diagnostic imaging ; Temporal Lobe/injuries* ; Writing* ; LinkOut - more
Keywords
Alexia ; Agraphia ; Hanja ; Hangul ; Kana ; Kanji ; Chinese letter ; Ideogram ; Phonogram
Abstract
Korean written language is composed of ideogram (Hanja) and phonogram (Hangul), as Japanese consists of Kanji (ideogram) and Kana (phonogram). Dissociation between ideogram and phonogram impairment after brain injury has been reported in Japanese, but few in Korean. We report a 64-yr-old right-handed man who showed alexia with agraphia in Hanja but preserved Hangul reading and writing after a left posterior inferior temporal lobe infarction. Interestingly, the patient was an expert in Hanja; he had been a Hanja calligrapher over 40 yr. However, when presented with 65 basic Chinese letters that are taught in elementary school, his responses were slow both in reading (6.3 sec/letter) and writing (8.8 sec/letter). The rate of correct response was 81.5% (53 out of 65 letters) both in reading and writing. The patient's performances were beyond mean-2SD of those of six age-, sex-, and education-matched controls who correctly read 64.7 out of 65 and wrote 62.5 out of 65 letters with a much shorter reaction time (1.3 sec/letter for reading and 4.0 sec/letter for writing). These findings support the notion that ideogram and phonogram can be mediated in different brain regions and Hanja alexia with agraphia in Korean patients can be associated with a left posterior inferior temporal lesion.
Files in This Item:
T200210085.pdf Download
DOI
10.3346/jkms.2002.17.1.91
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Rehabilitation Medicine (재활의학교실) > 1. Journal Papers
Yonsei Authors
Kim, Hyang Hee(김향희) ORCID logo https://orcid.org/0000-0003-4949-2512
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/144482
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