Neurophysiological correlates of word processing deficits in isolated reading and isolated spelling disorders
Neurophysiological correlates of word processing deficits in isolated reading and isolated spelling disorders
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DOI：
10.1016/j.clinph.2017.12.010
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发表时间：
2018-03-01
影响因子：
4.7
通讯作者：
Moll, Kristina
中科院分区：
文献类型：
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作者：
Bakos, Sarolta;Landerl, Karin;Moll, Kristina
目的：在一致的拼字法中，孤立阅读障碍 (iRD) 和孤立拼写障碍 (iSD) 几乎与组合阅读拼写障碍 (cRSD) 一样常见。然而，孤立和组合读写能力缺陷中潜在的文字处理缺陷的确切性质尚未得到很好的理解。方法：我们在 ERP 记录期间应用了语音词汇决策任务（包括单词、伪同音字、合法和非法伪词），以调查与正常发育 (TD) 9 岁儿童相比，iRD、iSD 和 cRSD 儿童的词汇和词汇下文字处理的神经生理学相关性。结果：TD 儿童表现出增强与其他组相比，对单词材料和违反拼写规则的早期敏感性（N170）。 TD 组和 iRD 组的词汇拼写效应（单词的 LPC 幅度高于伪同音字）相同，尽管 iRD 儿童的处理时间更长。在 iSD 和 cRSD 组中，随着时间的推移，只有拼写正确的单词的词汇正字法效果才明显且稳定。结论：iRD 儿童的正字法表示完好无损，但与 TD 相比，文字处理需要更长的时间。有拼写障碍的儿童有部分缺失拼写表征。 (C) 2017 年国际临床神经生理学联合会。由爱思唯尔爱尔兰有限公司出版
Objective: In consistent orthographies, isolated reading disorders (iRD) and isolated spelling disorders (iSD) are nearly as common as combined reading-spelling disorders (cRSD). However, the exact nature of the underlying word processing deficits in isolated versus combined literacy deficits are not well understood yet.Methods: We applied a phonological lexical decision task (including words, pseudohomophones, legal and illegal pseudowords) during ERP recording to investigate the neurophysiological correlates of lexical and sublexical word-processing in children with iRD, iSD and cRSD compared to typically developing (TD) 9-year-olds.Results: TD children showed enhanced early sensitivity (N170) for word material and for the violation of orthographic rules compared to the other groups. Lexical orthographic effects (higher LPC amplitude for words than for pseudohomophones) were the same in the TD and iRD groups, although processing took longer in children with iRD. In the iSD and cRSD groups, lexical orthographic effects were evident and stable over time only for correctly spelled words.Conclusions: Orthographic representations were intact in iRD children, but word processing took longer compared to TD. Children with spelling disorders had partly missing orthographic representations. (C) 2017 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd.