Behavioral performances in participants with phonological dyslexia and different patterns on the N170 component
Behavioral performances in participants with phonological dyslexia and different patterns on the N170 component
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DOI：
10.1016/j.bandc.2010.10.006
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发表时间：
2011-03-01
影响因子：
2.5
通讯作者：
Rebai, Mohamed
中科院分区：
文献类型：
--
作者：
Dujardin, Tiffanie;Etienne, Yann;Rebai, Mohamed
当erp记录在枕颞通路时，有语音阅读障碍的成年人和对照者执行词汇决策任务。根据N170持续时间，形成两个亚组：dysl1表现出更长的N170持续时间，而dysl2表现出正常的N170持续时间。虽然dysl1组对不常见词和假词的准确性较差，但dysl2组对假词的反应比对照组慢。在对照组中，N170的振幅在左半球更大，与项目无关。在dysl1亚组中，单词的N170波幅在左半球大于右半球，而伪单词的N170波幅则大于右半球，这是半球补偿的标志，而在dysl2亚组中，观察到双侧化的迹象。此外，在dysl1亚组中，P100的振幅小于对照组。这些结果表明，不同P100和N170组分模式的失读症患者的行为特征不同。ERP的变化可能是由于每个亚群采用不同的行为策略，二语障碍是语位障碍，一语障碍是语音障碍。(C) 2010爱思唯尔公司版权所有。
Adults with phonological dyslexia and controls performed a lexical decision task while ERPs were recorded in the occipitotemporal pathway. Based on N170 durations, two subgroups were formed: dysl1 showing longer N170 durations and dysl2 showing normal N170 durations. While the dysl1 subgroup had poorer accuracy for infrequent words and pseudo-words, the dysl2 group responded more slowly than controls to pseudo-words. N170 amplitudes were larger in the left hemisphere for controls irrespective of items. In the dysl1 subgroup, N170 amplitudes were larger in the left hemisphere than the right for words but not for pseudo-words, a sign of hemispheric compensation, while in the dysl2 subgroup signs of bilateralization were observed. Moreover, in the dysl1 subgroup, P100 amplitudes were smaller than controls. These results indicate different behavioral profiles of dyslexics with different patterns of P100 and N170 components. The ERP changes may be due to different behavioral strategies employed by each subgroup, logographic in dysl2 and phonological in dysl1. (C) 2010 Elsevier Inc. All rights reserved.