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首页> 外文期刊>Vision Research: An International Journal in Visual Science >Comparison of visual information processing in school-age dyslexics and normal readers via motion-onset visual evoked potentials
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Comparison of visual information processing in school-age dyslexics and normal readers via motion-onset visual evoked potentials

机译：通过动作视觉诱发电位比较学龄儿童诊所和普通读者的视觉信息处理

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摘要

Standard pattern-reversal visual evoked potentials (VEPs) and motion-onset VEPs (M-VEPs) were tested in 19 dyslexics and 19 normal readers aged 7-13 years in order to evaluate the feasibility of M-VEPs for the objective diagnostics of a visual subtype of dyslexia, in which a dysfunction of the magnocellular sub-system/dorsal stream of the visual pathway is suspected. The set of VEPs consisted of the pattern-reversal VEPs with check sizes of 20', two types of translational motion (with low and high contrast) and two types of radial motion (in the full field or the periphery). While the P100 peak parameters in pattern-reversal VEPs did not differ between the group of dyslexics and controls, the group of dyslexics displayed significantly longer N2 latencies in all types of M-VEPs. Abnormal N2 latencies were found in 35-56% of dyslexics in different types of M-VEPs, with translational motion with high contrast being the most sensitive stimulation. A receiver operating characteristic analysis showed that the latencies of M-VEPs displayed higher discrimination potential than M-VEPs amplitudes. The study confirms a "magnocellular pathway/dorsal stream deficit" in approximately half of dyslexics. (C) 2015 Elsevier Ltd. All rights reserved.
机译：标准模式 - 逆转视觉诱发电位（VEPS）和运动开始VEPS（M-VEPS）在19次缺点和19岁的普通读者中进行了测试，以评估M-VEPS对目标诊断的可行性诵读综合症的视觉亚型，其中怀疑视觉途径的磁细胞子系统/背部流的功能障碍。该组VEPS由具有20'的校验尺寸，两种类型的平移运动（具有低和高对比度）和两种类型的径向运动（在完整场或周边）的模式 - 逆转VEP组成。虽然模式 - 逆转VEPS中的P100峰值参数在缺点和控制组之间没有区别，但是一组疑风计划仪在所有类型的M-VEP中显示了明显更长的N2延迟。在35-56％的缺点症中发现了异常的N2潜水，不同类型的M-VEPS，具有高对比度的平移运动是最敏感的刺激。接收机操作特征分析表明，M-VEPS的延迟显示比M-VEPS幅度更高的辨别电位。该研究证实了大约一半的诵读仪式的“甲型甲型磁性途径/背部流赤字”。 （c）2015 Elsevier Ltd.保留所有权利。

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