Characteristics of Chinese-English bilingual dyslexia in right occipito-temporal lesion. 2017

Simon Kang Seng Ting, and Pei Shi Chia, and Yiong Huak Chan, and Kevin Jun Hong Kwek, and Wilnard Tan, and Shahul Hameed, and Eng-King Tan
Department of Neurology, Singapore General Hospital, Singapore, Singapore; National Neuroscience Institute, Singapore, Singapore. Electronic address: simon.ting.k.s@singhealth.com.sg.

Current literature suggests that right hemisphere lesions produce predominant spatial-related dyslexic error in English speakers. However, little is known regarding such lesions in Chinese speakers. In this paper, we describe the dyslexic characteristics of a Chinese-English bilingual patient with a right posterior cortical lesion. He was found to have profound spatial-related errors during his English word reading, in both real and non-words. During Chinese word reading, there was significantly less error compared to English, probably due to the ideographic nature of the Chinese language. He was also found to commit phonological-like visual errors in English, characterized by error responses that were visually similar to the actual word. There was no significant difference in visual errors during English word reading compared with Chinese. In general, our patient's performance in both languages appears to be consistent with the current literature on right posterior hemisphere lesions. Additionally, his performance also likely suggests that the right posterior cortical region participates in the visual analysis of orthographical word representation, both in ideographical and alphabetic languages, at least from a bilingual perspective. Future studies should further examine the role of the right posterior region in initial visual analysis of both languages.

UI MeSH Term Description Entries
D007839 Functional Laterality Behavioral manifestations of cerebral dominance in which there is preferential use and superior functioning of either the left or the right side, as in the preferred use of the right hand or right foot. Ambidexterity,Behavioral Laterality,Handedness,Laterality of Motor Control,Mirror Writing,Laterality, Behavioral,Laterality, Functional,Mirror Writings,Motor Control Laterality,Writing, Mirror,Writings, Mirror
D008297 Male Males
D011932 Reading Acquiring information from text.
D004411 Dyslexia, Acquired A receptive visual aphasia characterized by the loss of a previously possessed ability to comprehend the meaning or significance of handwritten words, despite intact vision. This condition may be associated with posterior cerebral artery infarction (INFARCTION, POSTERIOR CEREBRAL ARTERY) and other BRAIN DISEASES. Alexia, Acquired,Reading Disability, Acquired,Word Blindness, Acquired,Acquired Global Dyslexia,Acquired Spelling Dyslexia,Acquired Alexia,Acquired Dyslexia,Acquired Reading Disabilities,Acquired Reading Disability,Acquired Word Blindness,Acquired Word Blindnesses,Blindness, Acquired Word,Blindnesses, Acquired Word,Disabilities, Acquired Reading,Disability, Acquired Reading,Dyslexia, Acquired Global,Dyslexia, Acquired Spelling,Global Dyslexia, Acquired,Reading Disabilities, Acquired,Spelling Dyslexia, Acquired,Word Blindnesses, Acquired
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D044466 Asian People Persons having origins in any of the Asian racial groups of the Far East, Southeast Asia, or the Indian subcontinent including, for example, Cambodia, China, India, Japan, Korea, Malaysia, Pakistan, the Philippine Islands, Thailand, and Vietnam. Note that OMB category ASIAN is available for United States population groups. Race and ethnicity terms, as used in the federal government, are self-identified social construct and may include terms outdated and offensive in MeSH to assist users who are interested in retrieving comprehensive search results for studies such as in longitudinal studies. Asian Continental Ancestry Group,Asian Person,Asiatic Race,Mongoloid Race,Asian Peoples,Asian Persons,Asiatic Races,Mongoloid Races,People, Asian,Person, Asian,Race, Asiatic,Race, Mongoloid
D019303 Multilingualism The ability to speak, read, or write several languages or many languages with some facility. Bilingualism is the most common form. (From Random House Unabridged Dictionary, 2d ed) Bilingualism

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