Song J H, Banai K, Russo N M, Kraus N
Auditory Neuroscience Laboratory, Northwestern University, Evanston, IL 60208, USA.
Audiol Neurootol. 2006;11(4):233-41. doi: 10.1159/000093058. Epub 2006 May 3.
Auditory brainstem response (ABR) reflects activation of the neural generators along the ascending auditory pathway when a sound is heard. In this study, we explored the relationship between brainstem encoding of click and speech signals in normal-learning children and in those with language-based learning problems. To that end, ABR was recorded from both types of stimuli. We found that the normal pattern of correlation between click- and speech-evoked ABRs was disrupted when speech-evoked ABRs were delayed. Thus, delayed responses to speech were not indicative of clinically abnormal responses to clicks. We conclude that these two responses reflect largely separate neural processes and that only processes involved in encoding complex signals such as speech are impaired in children with learning problems.
听性脑干反应（ABR）反映了听到声音时沿听觉上行通路的神经发生器的激活情况。在本研究中，我们探讨了正常学习儿童和有基于语言的学习问题的儿童中，咔嗒声和语音信号的脑干编码之间的关系。为此，记录了这两种刺激的ABR。我们发现，当语音诱发的ABR延迟时，咔嗒声诱发的ABR与语音诱发的ABR之间的正常相关模式被破坏。因此，对语音的延迟反应并不表明对咔嗒声的临床异常反应。我们得出结论，这两种反应在很大程度上反映了不同的神经过程，并且只有参与编码诸如语音等复杂信号的过程在有学习问题的儿童中受损。
