发展性阅读障碍儿童视觉功能的事件相关电位研究
Chinese children developmental dyslexia:a visual event related potential study
查看参考文献14篇
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文摘
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目的 考察阅读障碍儿童的视觉巨细胞系统功能的神经心理学特性,探讨阅读障碍儿童与正常儿童的左右枕叶对单侧投射的视觉刺激的敏感性及其功能的半球差异特性.方法 用单侧视野投射方法,使用具有高时间频率的黑白对比视觉信号,同时使用ERP分析系统记录被试在完成简单视觉任务时的波形.结果 ①正常儿童在完成左右单侧视野投射任务的反应时基本相同[(294.7±12.47)ms～(298.3±135.8)ms],左侧枕叶加工来自右侧视野的视觉信号产生的ERP波形与右侧枕叶加工对侧视野信息产生的波形基本一致;②阅读障碍儿童的脑电波形与正常儿童比较差异有显著性;这种差异尤其表现在左侧枕叶O1的P120的峰潜伏期显著延迟为136.57 ms.结论 正常儿童的视觉巨细胞系统左右半球的功能是均势的,没有偏侧化的倾向;而阅读障碍儿童的视觉功能发育可能落后于正常儿童,并且在枕叶皮质存在左右半球差异,尤其是左侧枕叶的功能差异,这可能是阅读障碍儿童视觉巨细胞系统功能的发育的主要神经心理学特性. |
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其他语种文摘
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Objective To designed for exporing the neur?psychological feature of development dyslexia,especially in visual sensitivity of magnocellular system and hemispheric lateralization,.Methods The high tempo-ral frequencies dynamic visual stimuli were presented by lateral visual field and the scalp potentials were recorded by ERP analyses system.Results The reaction time in controls was similar between right visual field (RVF) and left visual field (LVF).The ERP waveforms produced by processing the visual signal from RVF at left occipital were as same as that of LVF.There was significant difference between dyslexia and controls,especially in the latency of P120 in electrode 01 Conclusions The left-right hemispheric functions of magnocellular system were equipollence and no predominance lateralization exists at leftright hemispheres.Development of magnocellular system in dyslexia may delay,and the development of interhemispheric asymmetry was irregulated,especially in left occipital,which was the main neuropsychologic feature of magnocelullar system in dyslexia. |
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来源
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中国行为医学科学
,2008,17(2):174-176 【扩展库】
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关键词
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发展性阅读障碍
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事件相关电位
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单侧视野刺激
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视觉缺陷
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大脑偏侧化
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地址
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1.
中科院心理所, 北京, 100012
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深圳市精神卫生研究所
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-8559 |
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学科
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特种医学 |
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文献收藏号
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CSCD:3372485
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