Auditory-Motor Control of Vocal Production during Divided Attention: Behavioral and ERP Correlates.
Auditory-Motor Control of Vocal Production during Divided Attention: Behavioral and ERP Correlates.
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注意力分散期间发声的听觉运动控制：行为和 ERP 相关
DOI：
10.3389/fnins.2018.00113
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发表时间：
2018
影响因子：
4.3
通讯作者：
Liu H
中科院分区：
文献类型：
--
作者：
Liu Y;Fan H;Li J;Jones JA;Liu P;Zhang B;Liu H
当人们在听觉反馈中听到意想不到的干扰时，他们会对自己的发声行为进行快速的补偿性调整。最近的证据表明，声音补偿和皮层事件相关电位(ERPs)对注意到的音调反馈扰动的反应增强，这表明这种反射样行为受到选择性注意的影响。然而，关于在分散注意力的过程中，听觉-运动整合用于语音控制的研究知之甚少。本研究采用跨通道研究的方法，研究了在分散注意过程中，听觉反馈控制声调产生的行为与事件相关电位。在产生持续元音的过程中，32名年轻人被指示同时注意他们听到的音调反馈扰动和他们看到的闪烁的红灯。视觉刺激的呈现速度是不同的，以产生低、中、高三种注意力负荷。行为学结果表明，低负荷条件下对音高扰动的发声补偿明显小于中等负荷和高负荷条件下。此外，声调反馈的大脑皮层处理也作为分散注意力的函数进行调节。与低负荷和中等负荷条件相比，高负荷条件下对螺距扰动的N1反应明显较大，而P2反应较小。这些发现提供了第一个神经行为证据，证明分散的注意力可以调节对音调产生的听觉反馈控制。
When people hear unexpected perturbations in auditory feedback, they produce rapid compensatory adjustments of their vocal behavior. Recent evidence has shown enhanced vocal compensations and cortical event-related potentials (ERPs) in response to attended pitch feedback perturbations, suggesting that this reflex-like behavior is influenced by selective attention. Less is known, however, about auditory-motor integration for voice control during divided attention. The present cross-modal study investigated the behavioral and ERP correlates of auditory feedback control of vocal pitch production during divided attention. During the production of sustained vowels, 32 young adults were instructed to simultaneously attend to both pitch feedback perturbations they heard and flashing red lights they saw. The presentation rate of the visual stimuli was varied to produce a low, intermediate, and high attentional load. The behavioral results showed that the low-load condition elicited significantly smaller vocal compensations for pitch perturbations than the intermediate-load and high-load conditions. As well, the cortical processing of vocal pitch feedback was also modulated as a function of divided attention. When compared to the low-load and intermediate-load conditions, the high-load condition elicited significantly larger N1 responses and smaller P2 responses to pitch perturbations. These findings provide the first neurobehavioral evidence that divided attention can modulate auditory feedback control of vocal pitch production.
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