中国发展性阅读障碍儿童的视觉运动加工:fMRI研究

IF 1.9 3区 教育学 Q1 EDUCATION, SPECIAL
Dyslexia Pub Date : 2022-08-12 DOI:10.1002/dys.1726
Yu-Fei Liu, Yi Qian, Hong-Yan Bi
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引用次数: 0

摘要

背流是视觉信息传递的重要途径。中颞叶视觉运动区(V5/MT+)作为背侧通路的一部分,主要负责视觉运动加工,其视觉运动加工能力与阅读密切相关。与字母文字相比,汉字的视觉结构更为复杂,且没有明确的字形-音素对应规则。因此,视觉分析能力在汉字处理中起着至关重要的作用。本研究首先考察了中国阅读困难儿童和同实足年龄儿童在观察连贯运动刺激时的脑激活情况。ROI分析显示,阅读障碍组只有左侧V5/MT+激活明显弱于对照组。大细胞-背侧流活动与正字法意识密切相关。在阅读障碍组,V5/MT+激活越强,语音意识、快速命名能力和正字法意识越差。总之,中国阅读障碍儿童的左V5/MT+激活不足,而大细胞-背侧通路的活性与中国小学生的正字法意识密切相关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Visual motion processing in Chinese children with developmental dyslexia: An fMRI study

Dorsal stream is an important pathway for visual information transmission. As a part of the dorsal pathway, the middle temporal visual motion areas (V5/MT+) are mainly responsible for visual motion processing and the ability of visual motion processing is closely related to reading. Compared with alphabetic scripts, the visual structure of Chinese characters is more complex and there are no clear grapheme-phoneme correspondence rules. So the ability of visual analysis plays an important role in Chinese character processing. This study first investigated the brain activation of Chinese dyslexic children and children of the same chronological age when they observed coherent motion stimuli. ROI analysis indicated that only the activation of left V5/MT+ was significantly weaker in dyslexics than that in the control group. The activity of the magnocellular-dorsal stream was closely related to orthographic awareness in the combined data (two groups) and the typical children. In dyslexia group, the stronger the activation of V5/MT+ was, the worse the phonological awareness, rapid naming performance and orthographic awareness were. In short, Chinese dyslexic children were deficient in the activation of the left V5/MT+ and the activity of the magnocellular-dorsal pathway was closely related to orthographic awareness in Chinese pupils.

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来源期刊
Dyslexia
Dyslexia Multiple-
CiteScore
3.90
自引率
9.10%
发文量
27
期刊介绍: DYSLEXIA provides reviews and reports of research, assessment and intervention practice. In many fields of enquiry theoretical advances often occur in response to practical needs; and a central aim of the journal is to bring together researchers and practitioners in the field of dyslexia, so that each can learn from the other. Interesting developments, both theoretical and practical, are being reported in many different countries: DYSLEXIA is a forum in which a knowledge of these developments can be shared by readers in all parts of the world. The scope of the journal includes relevant aspects of Cognitive, Educational, Developmental and Clinical Psychology Child and Adult Special Education and Remedial Education Therapy and Counselling Neuroscience, Psychiatry and General Medicine The scope of the journal includes relevant aspects of: - Cognitive, Educational, Developmental and Clinical Psychology - Child and Adult Special Education and Remedial Education - Therapy and Counselling - Neuroscience, Psychiatry and General Medicine
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