The influence of a sensitive period for auditory-visual integration in children with cochlear implants.
The influence of a sensitive period for auditory-visual integration in children with cochlear implants.
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DOI：
10.3233/rnn-2010-0525
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发表时间：
2010
影响因子：
2.8
通讯作者：
Dorman MF
中科院分区：
文献类型：
--
作者：
Gilley PM;Sharma A;Mitchell TV;Dorman MF
经历长期听觉剥夺的儿童很容易受到负责言语和语言感知的听觉皮层区域的大规模重组。这种重组的结果之一是，在人工耳蜗恢复听力后，听觉和视觉信息的整合可能会发生改变。我们的目标是研究重组在检查多感官整合过程中表现的任务中的影响。在一组听力正常的儿童和两组人工耳蜗植入的儿童中检查了检测基本听觉（A）、视觉（V）和组合听觉-视觉（AV）刺激的反应时间：（1）皮质听觉诱发电位（CAEP）处于正常发育限制内的早期植入儿童，以及（2）CAEP 超出正常发育限制的晚期植入儿童。对每组进行米勒种族模型不平等测试，以检查听觉剥夺对植入后多感觉整合能力的影响。结果显示，听力正常的儿童和早期植入的儿童明显违反了种族模型的不平等，但晚期植入的儿童则没有。这些结果表明，对多模式感觉输入的共激活不能解释晚期植入儿童对多模式输入反应时间的缩短。这些结果是关于当前冗余感觉信息共激活模型进行讨论的。
Children who experience long periods of auditory deprivation are susceptible to large-scale reorganization of auditory cortical areas responsible for the perception of speech and language. One consequence of this reorganization is that integration of combined auditory and visual information may be altered after hearing is restored with a cochlear implant. Our goal was to investigate the effects of reorganization in a task that examines performance during multisensory integration. Reaction times to the detection of basic auditory (A), visual (V), and combined auditory-visual (AV) stimuli were examined in a group of normally hearing children, and in two groups of cochlear implanted children: (1) early implanted children in whom cortical auditory evoked potentials (CAEPs) fell within normal developmental limits, and (2) late implanted children in whom CAEPs were outside of normal developmental limits. Miller’s test of the race model inequality was performed for each group in order to examine the effects of auditory deprivation on multisensory integration abilities after implantation. Results revealed a significant violation of the race model inequality in the normally hearing and early implanted children, but not in the group of late implanted children. These results suggest that coactivation to multi-modal sensory input cannot explain the decreased reaction times to multi-modal input in late implanted children. These results are discussed in regards to current models for coactivation to redundant sensory information.