Attention modulates cortical processing of pitch feedback errors in voice control.
Attention modulates cortical processing of pitch feedback errors in voice control.
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注意力调节语音控制中音调反馈误差的皮层处理
DOI：
10.1038/srep07812
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发表时间：
2015-01-15
影响因子：
4.6
通讯作者：
Liu H
中科院分区：
文献类型：
--
作者：
Hu H;Liu Y;Guo Z;Li W;Liu P;Chen S;Liu H
大量证据表明，听觉反馈的意外变化会导致发声产生快速的补偿性调整。尽管人们普遍认为这些调整是非自愿的，但这些调整是否会受到注意力的影响仍是个未知数。本研究旨在探讨注意是否会影响听觉-声音整合的神经行为加工。在保持元音发声和听到音调变化反馈的同时，参与者被要求要么忽略音调扰动，要么注意到低注意负荷(计数扰动次数)或高注意负荷(计数扰动类型)。行为学结果显示，无论是否有人参与，对音调扰动的声音反应都没有系统性的变化。在皮层水平，与忽略音调干扰时相比，在低负荷条件下，P2对注意音调扰动的反应增强。然而，在高负荷条件下，P2反应与忽略条件下的反应没有不同。这些发现提供了第一个神经生理学证据，表明声音控制中的听觉-运动整合可以作为大脑皮质水平上的注意力功能来调节。此外，这种调节效应不会导致普遍的增强，但会受到注意力负荷的影响。
Considerable evidence has shown that unexpected alterations in auditory feedback elicit fast compensatory adjustments in vocal production. Although generally thought to be involuntary in nature, whether these adjustments can be influenced by attention remains unknown. The present event-related potential (ERP) study aimed to examine whether neurobehavioral processing of auditory-vocal integration can be affected by attention. While sustaining a vowel phonation and hearing pitch-shifted feedback, participants were required to either ignore the pitch perturbations, or attend to them with low (counting the number of perturbations) or high attentional load (counting the type of perturbations). Behavioral results revealed no systematic change of vocal response to pitch perturbations irrespective of whether they were attended or not. At the level of cortex, there was an enhancement of P2 response to attended pitch perturbations in the low-load condition as compared to when they were ignored. In the high-load condition, however, P2 response did not differ from that in the ignored condition. These findings provide the first neurophysiological evidence that auditory-motor integration in voice control can be modulated as a function of attention at the level of cortex. Furthermore, this modulatory effect does not lead to a general enhancement but is subject to attentional load.
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