Neural Correlates of Orthographic and Phonological Consistency Effects in Children
Neural Correlates of Orthographic and Phonological Consistency Effects in Children
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DOI：
10.1002/hbm.20476
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发表时间：
2008-12-01
影响因子：
4.8
通讯作者：
Booth, James R.
中科院分区：
文献类型：
--
作者：
Bolger, Donald J.;Hornickel, Jane;Booth, James R.
本研究的目的是利用功能磁共振成像（fMRI）技术研究视觉文字加工中语音不一致（拼写与发音的关系）和正字法不一致（发音与拼写的关系）的神经相关性。儿童（9- 15岁）进行了押韵和拼写任务，其中两个单词顺序呈现在视觉模态。与以前的研究在成年人中一致，较高的语音不一致性与更大的激活在几个区域，包括左额下回和内侧额回/前扣带皮层。我们还证明了正字法不一致的影响，在这些相同的领域，这表明这些地区参与整合的正字法和语音信息，相对于内侧额叶/前扣带回，更大的要求执行功能。较高的语音和拼写的一致性与更大的激活楔前叶/后扣带皮层，假定的稳定状态系统在休息时活跃，表明较低的认知资源的要求一致的项目。这两个一致性的影响较大的押韵相比，拼写任务，更大的要求整合拼写和声音在前一个任务。最后，押韵任务的准确性与左梭状回的一致性效应呈负相关。特别是，这个区域表现出不敏感的一致性低性能，不一致的敏感性（较高的活动）在中等性能，和敏感性的不一致性（高激活）和一致性（失活）。一般来说，这些结果表明，影响拼写的声音（和声音拼写）对应处理梭状回发展作为一个功能的技能。伤害大脑地图29：14161429，2008。(C)2007年威利-利斯。Inc.
The objective of this study was to examine the neural correlates of phonological inconsistency (relationship of spelling to sound) and orthographic inconsistency (relationship of sound to spelling) in visual word processing using functional magnetic resonance imaging (fMRI). Children (9- to 15-year-old) performed a rhyming and spelling task in which two words were presented sequentially in the visual modality. Consistent with previous studies in adults, higher phonological inconsistency was associated with greater activation in several regions including left inferior frontal gyrus and medial frontal gyrus/anterior cingulate cortex. We additionally demonstrated an effect of orthographic inconsistency in these same areas, suggesting that these regions are involved in the integration of orthographic and phonological information and, with respect to the medial frontal/anterior cingulate, greater demands on executive function. Higher phonological and orthographic consistency was associated with greater activation in precuneus/posterior cingulate cortex, the putative steady state system active during resting, suggesting lower demands on cognitive resources for consistent items. Both consistency effects were larger for the rhyming compared with the spelling task suggesting greater demands of integrating spelling and sound in the former task. Finally, accuracy on the rhyming task was negatively correlated with the consistency effect in left fusiform gyrus. In particular, this region showed insensitivity to consistency in low performers, sensitivity to inconsistency (higher activity) in moderate performers, and sensitivity to inconsistency (high activation) and to consistency (deactivation). In general, these results show that the influence of spelling-sound (and sound-spelling) correspondences on processing in fusiform gyrus develops as a function of skill. Hurt Brain Mapp 29:14161429, 2008. (C) 2007 Wiley-Liss. Inc.