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Left hemiparalexia of Chinese characters: neglect dyslexia or disruption of pathway of visual word form processing?

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Left hemiparalexia of Chinese characters: neglect dyslexia or disruption of pathway of visual word form processing?

Content Provider	Springer Nature Link
Author	Yi, Wenchao Wu, Ting Chen, Wei Yuan, Ti fei Luo, Benyan Shan, Chunlei Li, Jianan He, Sheng Weng, Xuchu
Copyright Year	2013
Abstract	The objective of the study was to further elucidate the potential mechanisms underlying left hemiparalexia induced by a splenium lesion in corpus callosum. A patient KY, who had infarctions in the splenium and the left ventral medial occipitotemporal area, was examined with neuropsychological tests and fMRI. KY presented left hemiparalexia when he read aloud characters presented in central foveal field tachistoscopically as well as in free-view field. KY also showed left hemialexia for characters in left visual field, while no left hemiparalexia occurred when characters were presented in the right visual field. KY performed poorly in lexical decision tasks. He could judge the directions of Landolt’s rings gaps in the left or right visual field equally. The result of fMRI indicated that characters in the left visual field could not activate the visual word form area (VWFA), such as left mid-fusiform cortex. All the above neuropsychological and fMRI findings have provided evidences against the assumption of left hemineglect dyslexia. Instead, they support the mechanism of disconnection of visual word form processing pathway. In conclusion, the evidences suggested that the visual information transmission of characters in the left visual field from right occipital area to the VWFA in the left hemisphere was interrupted by the splenium lesion.
Starting Page	283
Ending Page	292
Page Count	10
File Format	PDF
ISSN	18632653
Journal	Anatomy and Embryology
Volume Number	219
Issue Number	1
e-ISSN	18632661
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-01-09
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Left hemiparalexia Left hemialexia Hemineglect dyslexia Splenium of corpus callosum Visual word form area (VWFA) FMRI Neurosciences Cell Biology Neurology
Content Type	Text
Resource Type	Article
Subject	Neuroscience Anatomy Histology

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