Differential effects of perturbation direction and magnitude on the neural processing of voice pitch feedback.
Differential effects of perturbation direction and magnitude on the neural processing of voice pitch feedback.
复制标题
扰动方向和幅度对音调反馈神经处理的不同影响
DOI：
10.1016/j.clinph.2010.08.010
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发表时间：
2011-05
期刊：
影响因子：
--
通讯作者：
Larson CR
中科院分区：
文献类型：
--
作者：
Liu H;Meshman M;Behroozmand R;Larson CR
本研究考察了声音听觉反馈扰动方向和幅度对声音基频（F0）反应和事件相关电位（ERPs）的差异影响。研究了12名右撇子说话者在持续200 ms的元音发声过程中，语音音高反馈发生±100、±200和±500分的位移时，语音F0反应和erp的N1和P2分量。向下的音高反馈扰动比向上的扰动导致更大的声音F0响应。在200美分和500美分的刺激强度下，N1和P2分量的振幅下降比上升更大。较短的N1和P2潜伏期也与较大的音高反馈扰动有关。对上下音高反馈扰动的声音和神经反应的相应变化表明，erp的N1和P2分量反映了声音反应的神经伴随物。语音反馈音高扰动的大小和方向对N1和P2 ERP分量的交互作用表明，语音音高听觉反馈中错误检测和纠正的神经机制对音高扰动的大小和方向都有不同的敏感性。
The present study examined the differential effects of voice auditory feedback perturbation direction and magnitude on voice fundamental frequency (F0) responses and event-related potentials (ERPs) from EEG electrodes on the scalp. The voice F0 responses and N1 and P2 components of ERPs were examined from twelve right-handed speakers when they sustained a vowel phonation and their mid-utterance voice pitch feedback was shifted ±100, ±200, and ± 500 cents with 200 ms duration. Downward voice pitch feedback perturbations led to larger voice F0 responses than upward perturbations. The amplitudes of N1 and P2 components were larger for downward compared with upward pitch shifts for 200 and 500 cents stimulus magnitudes. Shorter N1 and P2 latencies were also associated with larger magnitudes of pitch feedback perturbations. Corresponding changes in vocal and neural responses to upward and downward voice pitch feedback perturbations suggest that the N1 and P2 components of ERPs reflect neural concomitants of the vocal responses. The findings of interactive effects between the magnitude and direction of voice feedback pitch perturbation on N1 and P2 ERP components indicate that the neural mechanisms underlying error detection and correction in voice pitch auditory feedback are differentially sensitive to both the magnitude and direction of pitch perturbations.
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影响因子：
2.4
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