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Altered electroencephalographic networks in developmental dyslexia after remedial training:a prospective case-control study

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Neural Regeneration Research 2021年第4期16卷 734-743页

作者： Juliana A.Dushanova Stefan ATsokov Institute of Neurobiology Bulgarian Academy of SciencesSofiaBulgaria

Electroencephalographic studies using graph theoretic analysis have found aberrations in functional connectivity in children with developmental ***,how the training with visual tasks can change the functional connectivity of the semantic network in developmental dyslexia is still *** looked for differences in local and global topological properties of functional networks between 21 healthy controls and 22 dyslexic children(8–9 years old)before and after training with visual tasks in this prospective case-control *** minimum spanning tree method was used to construct the subjects’brain networks in multiple electroencephalographic frequency ranges during a visual word/pseudoword discrimination *** found group differences in the theta,alpha,beta and gamma bands for four graph measures suggesting a more integrated network topology in dyslexics before the training compared to *** training,the network topology of dyslexic children had become more segregated and similar to that of the *** theθ,αandβ1-frequency bands,compared to the controls,the pre-training dyslexics exhibited a reduced degree and betweenness centrality of the left anterior temporal and parietal *** simultaneous appearance in the left hemisphere of hubs in temporal and parietal(α,β1),temporal and superior frontal cortex(θ,α),parietal and occipitotemporal cortices(β1),identified in the networks of normally developing children was not present in the brain networks of *** training,the hub distribution for dyslexics in the theta and beta1 bands had become similar to that of the *** summary,our findings point to a less efficient network configuration in dyslexics compared to a more optimal global organization in the *** is the first study to investigate the topological organization of functional brain networks of Bulgarian dyslexic *** for the study was obtained from the Ethics Committee of the Institute of Neur

关键词： adjusted post-training network developmental dyslexia EEG frequency oscillations functional connectivity visual training tasks visual word/pseudoword discrimination

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Working-memory training improves developmental dyslexia in Chinese children

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Neural Regeneration Research 2013年第5期8卷 452-460页

作者： Yan Luo Jing Wang Hanrong Wu Dongmei Zhu Yu Zhang Department of Child and Women Health Care School of Public Health Tongji Medical College Huazhong University of Science and Technology Wuhan Mental Health Center

Although plasticity in the neural system underlies working memory, and working memory can be improved by training, there is thus far no evidence that children with developmental dyslexia can benefit from working-memory training. In the present study, thirty dyslexic children aged 8-11 years were recruited from an elementary school in Wuhan, China. They received working-memory training including training in visuospatial memory, verbal memory, and central executive tasks. The difficulty of the tasks was adjusted based on the performance of each subject, and the training sessions lasted 40 minutes per day, for 5 weeks. The results showed that working-memory training significantly enhanced performance on the nontrained working memory tasks such as the visuospatial, the verbal domains, and central executive tasks in children with developmental dyslexia. More importantly, the visual rhyming task and reading fluency task were also significantly improved by training. Progress on working memory measures was related to changes in reading skills. These experimental findings indicate that working memory is a pivotal factor in reading development among children with developmental dyslexia, and interventions to improve working memory may help dyslexic children to become more proficient in reading.

关键词： neural regeneration neurorehabilitation developmental dyslexia working memory training visuospatial memory verbal memory central executive task visual rhyming task reading fluency task Chinese children brain function grants-supported paper photographs-containing paper neuroregeneration

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Eye-movement Patterns of Chinese Children with developmental dyslexia during the Stroop Test

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Biomedical and Environmental Sciences 2018年第9期31卷 677-685页

作者： WU Yu Jia YANG Wen Han WANG Qing Xiong YANG De Sheng HU Xiao Yun JING Jin LI Xiu Hong Department of Maternal and Child Health School of Public Health Sun Yat-sen University

Objective To compare the eye-movement patterns of Chinese children with developmental dyslexia（DD children） with those of non-dyslexic children as they perform the Stroop Color and Word Test（SCWT）, and to explore the relationship between their eye-movement patterns and interference effect. Methods An EyeLink II was used to record the eye-movement parameters of 32 DD children and 37 non-dyslexic children as they performed the SCWT. The independent samples t-test and repeated measures were used to analyze behavioral and eye-movement parameters. Results Compared to the control group, Chinese DD children presented lower accuracy（F = 8.488）, slower response time（F = 25.306）, and larger interference effect（t = 2.29）; Chinese DD children also exhibited lower frequency of fixations（F = 6.069）, greater numbers of saccades（F = 7.914） and fixations（F = 5.272）, and shorter mean saccade distance（F = 4.03）. All behavioral and eye-movement parameters differed significantly among the three tasks in the SCWT. There was significant interaction between groups and tasks in accuracy（F = 5.844）, and marginally significant interaction in response time（F = 3.040）. Chinese DD children tended to have lower accuracy and longer response time than the control group in the ＇color-word naming＇ task. Conclusion Compared to non-dyslexic children, Chinese DD children are subject to a stronger interference effect. When performing the SCWT, Chinese DD children exhibit abnormal eye-movement patterns, namely shorter mean saccade distance, lower frequency of fixations, and more fixations and saccades. These abnormal eye movements may be relatively stable oculomotor patterns of DD children performing visual processing, and not influenced by impaired interference effect.

关键词： developmental dyslexia Chinese children Eye movement Stroop Color and Word Test

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Prevalence of developmental dyslexia in primary school children:a protocol for systematic review and meta-analysis

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World Journal of Pediatrics 2022年第12期18卷 804-809页

作者： Li-Ping Yang Chun-Bo Li Xiu-Mei Li Man-Man Zhai Jing Zhao Xu-Chu Weng Key Laboratory of Brain Cognition and Education SciencesMinistry of Education55 Zhongshan Avenue WestTianhe DistrictGuangzhou510631China School of Psychology South China Normal UniversityGuangzhou510631China Shanghai Key Laboratory of Psychotic Disorders Shanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghai200030China CAS Center for Excellence in Brain Science and Intelligence Technology(CEBSIT) Chinese Academy of ScienceShanghai200031China Institute of Psychology and Behavioral Science Shanghai Jiao Tong UniversityShanghai200030China Institutes of Psychological Sciences Hangzhou Normal UniversityRoom 30119 Shuyuan Building2318 Yuhangtang RoadCangqianYuhang DistrictHangzhou311121China Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments Hangzhou311121China Institute for Brain Research and Rehabilitation South China Normal UniversityGuangzhou510631China

Background developmental dyslexia(DD)is a specific impairment during the acquisition of reading skills and may have a lifelong negative impact on *** estimates of the prevalence of DD serve as the basis for evidence-based health resource allocation and policy ***,the prevalence of DD in primary school children varies largely across ***,it is unclear whether there are differences in prevalence in different genders and writing ***,the present study aims to conduct a systematic review and meta-analysis to assess the global prevalence of DD and to explore related *** We will undertake a comprehensive literature search in 14 databases,including EMBASE,PubMed,Web of Science,China National Knowledge Infrastructure and Cochrane,from their inception to June ***-sectional and longitudinal studies that describe the prevalence of DD will be *** quality of the included observational studies will be assessed using the Strengthening the Reporting of Observational Studies in Epidemiology *** risk of bias will be determined by sensitivity analysis to identify publication *** One meta-analysis will be conducted to estimate the prevalence of DD in primary school *** will be assessed in terms of the properties of subjects(e.g.,gender,grade and writing system)and method of diagnosis in the included primary *** analyses will also be performed for population and secondary *** The results will synthesize the prevalence of DD and provide information for policy-makers and public health specialists.

关键词： developmental dyslexia Prevalence Primary school children Protocol

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Eye-movement study during visual search in Chinese children with developmental dyslexia

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Chinese Medical Journal 2013年第22期126卷 4306-4311页

作者： LI Xiu-hong JING Jin YANG De-sheng WANG Hui WANG Qing-xiong SONG Shan-shan FAN Fang Faculty of Maternal and Child Health Preventive Medicine Institute School of Public Health Sun Yat-sen University Guangzhou Guangdong 510080 China Key Laboratory of Mental Health and Cognitive Science of Guangdong Province South China Normal University Guangzhou Guangdong 510631 China

Background developmental dyslexia （DD） is a disorder in which children with normal intelligence and sensory abilities show learning deficits in reading. Abnormal eye movements have been found in DD. However, eye-movement abnormalities during visual search among Chinese children with DD remain unknown. We aimed to identify the eye- movement characteristics and search efficiency of Chinese children with DD during visual search for targets of different conceptual categories, under same-category conditions. Methods We compared 32 Chinese dyslexic children and 39 non-dyslexic children in visual search tasks, which were assessed using EyeLink II High-Speed Eye Tracker （SR Research Ltd., Canada）. Letters, single Chinese characters, digits, Chinese phrases, figures and facial expressions were used as stimuli. Targets were similar to distractors in meaning, phonology and/or shape. Results A main effect of task on visual search scores and all eye-movement parameters were found. Search scores, average saccade amplitude and saccade distance were significantly smaller in the DD group than in the controls. An interaction between group and task was found for pupil diameter. Conclusions Unlike normal readers, children with DD had a reduction in the visual attention span and search accuracy. Besides, children with DD could not increase their mental workload with increase in task difficulty. The conceptual category of the stimulus materials significantly impacts search speed, accuracy and eye-movement parameters.

关键词： children developmental dyslexia eye movement visual search

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An Analysis of developmental dyslexia in Chinese Orthography

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校园英语 2019年第15期 235-235页

作者：卓越贵州大学外国语学院

developmental dyslexia or specific reading disability has long been investigated in English-speaking communities; however, Asian readers recently have been noticed to have specific difficulties in reading. The paper will illustrate the Chinese dyslexic presentations as well as to identify how Chinese orthography has effects on Chinese developmental dyslexia.

关键词： developmental dyslexia Chinese Orthography

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Orthographic Processing of developmental Dyslexic Children in China: Evidence from an Event-Related Potential Study

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Current Medical Science 2021年第6期41卷 1239-1246页

作者： Shu-ting TANG Fang-fang LIU Zeng-chun LI Ke-gao DENG Ran-ran SONG Peng-xiang ZUO Medical College Shihezi UniversityShihezi 832002China School of Public Health Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Objective:This study aimed to explore the orthographic processing of simplified Chinese characters in developmental dyslexic children in Kashgar,Xinjiang,China,and provide a theoretical basis for intervention strategies for developmental dyslexia in ***:Using event-related potential(ERP)measures,18 developmental dyslexic children and 23 typically developing children performed a character decision task with three types of stimuli:real characters(RCs),pseudocharacters(PCs),and noncharacters(NCs).Results:Behavioral results showed that the control children displayed a faster and higher accurate performance than the dyslexic children across PCs and *** data revealed that the RCs and PCs elicited a stronger P200 than the *** with the RCs and NCs,children in the control group showed more N400 negatives for *** is worth mentioning that dyslexic children did not show any difference on N400,which reflected the insufficient orthographic processing of dyslexic children in ***:These results show that Chinese dyslexic children had orthographic processing defects.

关键词： developmental dyslexia orthographic processing radical position simplified Chinese characters event-related potential

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Eye movements characteristics of Chinese dyslexic children in picture searching

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Chinese Medical Journal 2008年第17期121卷 1617-1621页

作者： HUANG Xu JING Jin ZOU Xiao-bing WANG Meng-long LI Xiu-hong LIN Ai-hua Faculty of Maternal and Child Health Preventive Medicine Institute School of Public Health Sun Yat-sen University Guangzhou Guangdong 510080 China Child developmental and Behavioral Center Third Affiliated Hospital of Sun Yat-sen University Guangzhou Guangdong 510630 China Faculty of Epidemiology and Health Statistics School of Public Health Sun Yat-sen University Guangzhou Guangdong 510080 China

Background Reading Chinese, a kind of ideogram, relies more on visual cognition. The visuospatial cognitive deficit of Chinese dyslexia is an interesting topic that has received much attention. The purpose of current research was to explore the visuopatial cognitive characteristics of Chinese dyslexic children by studying their eye movements via a picture searching test. Methods According to the diagnostic criteria defined by ICD-10, twenty-eight dyslexic children （mean age （10.12±1.42） years） were enrolled from the Clinic of Children Behavioral Disorder in the third affiliated hospital of Sun Yat-sen University. And 28 normally reading children （mean age （10.06±1.29） years）, 1：1 matched by age, sex, grade and family condition were chosen from an elementary school in Guangzhou as a control group. Four groups of pictures （cock, accident, canyon, meditate） from Picture Vocabulary Test were chosen as eye movement experiment targets. All the subjects carried out the picture searching task and their eye movement data were recorded by an Eyelink II High-Speed Eye Tracker. The duration time, average fixation duration, average saccade amplitude, fixation counts and saccade counts were compared between the two groups of children. Results The dyslexic children had longer total fixation duration and average fixation duration （F=-7.711, P 〈0.01; F=-4.520, P 〈0.05）, more fixation counts and saccade counts （F=-7.498, P 〈0.01; F=-11.040, P 〈0.01）, and a smaller average saccade amplitude （F=-29.743, P 〈0.01） compared with controls. But their performance in the picture vocabulary test was the same as those of the control group. The eye movement indexes were affected by the difficulty of the pictures and words, all eye movement indexes, except saccade amplitude, had a significant difference within groups （P 〈0.05）. Conclusions Chinese dyslexic children have abnormal eye movements in picture searching, applying slow fixations, more fixations and small and frequent saccades. Their abno

关键词： developmental dyslexia child eye movements

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汉语阅读障碍儿童的视觉空间注意能力及其与汉语阅读的关系

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心理学 2020年第12期

作者：杨飒季雨竹刘梦连毕鸿燕

目的：探究汉语阅读障碍儿童的视觉空间注意与汉语阅读的关系。方法：依据识字量测试和瑞文智力测试得分筛选出阅读障碍(DD)儿童55例，并按年龄、智力匹配同年龄正常对照组(CA)儿童66例。采用数字划消测试测查两组儿童视觉空间注意能力... 详细信息

目的：探究汉语阅读障碍儿童的视觉空间注意与汉语阅读的关系。方法：依据识字量测试和瑞文智力测试得分筛选出阅读障碍(DD)儿童55例，并按年龄、智力匹配同年龄正常对照组(CA)儿童66例。采用数字划消测试测查两组儿童视觉空间注意能力。对所有被试进行阅读流畅性、阅读准确性、语音意识、语素意识等测试。结果：汉语DD儿童的注意划消得分低于CA儿童[(29.6±6.8)vs.(32.3±6.3)，P＜0.05]。相关分析表明视觉空间注意与阅读流畅性(r=0.31，P＜0.01)和阅读准确性(r=0.31，P＜0.001)呈中度正相关。多重回归的结果表明语素意识和快速命名可以预测儿童的阅读准确性(β=0.4，P＜0.01；β=-0.39，P＜0.01)与流畅性(β=031，P＜0.01；β=-0.50，P＜0.01)。结论：视觉空间注意缺陷可能是引起汉语阅读障碍的原因之一，并且这种缺陷与阅读能力存在关系。

关键词：发展性阅读障碍视觉空间注意汉语儿童汉语阅读 developmental dyslexia visual spatial attention Chinese children Chinese reading

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发展性计算障碍儿童的数感缺陷

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心理学 2020年第3期

作者：张李斌张丽冯廷勇

为了探究计算障碍儿童是否存在数感缺陷以及这种缺陷是否特异于计算障碍儿童，本研究使用非符号数量比较任务，以小学二三年级学生为被试，测量了计算障碍(72名)、阅读障碍(76名)、双障碍(69名)以及正常儿童(86名)的数感能力。结果显示... 详细信息

为了探究计算障碍儿童是否存在数感缺陷以及这种缺陷是否特异于计算障碍儿童，本研究使用非符号数量比较任务，以小学二三年级学生为被试，测量了计算障碍(72名)、阅读障碍(76名)、双障碍(69名)以及正常儿童(86名)的数感能力。结果显示：(1)在正确率和韦伯分数指标上，计算障碍组和正常组儿童数感能力差异显著；(2)阅读障碍组和双障碍组也存在数感缺陷。表明计算障碍儿童的确存在数感缺陷，然而数感缺陷并不特定于计算障碍儿童。

关键词：数感计算障碍阅读障碍非符号数量比较任务 number sense developmental dyscalculia developmental dyslexia non-symbolic magnitude comparison task

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