ERP correlates of pitch error detection in complex tone and voice auditory feedback with missing fundamental.
ERP correlates of pitch error detection in complex tone and voice auditory feedback with missing fundamental.
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DOI：
10.1016/j.brainres.2012.02.012
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发表时间：
2012-04-11
期刊：
影响因子：
2.9
通讯作者：
Larson CR
中科院分区：
文献类型：
--
作者：
Behroozmand R;Korzyukov O;Larson CR
先前的研究表明，声音的音高是在没有基频（F0）的情况下感知的，这表明一种独特的机制可以基于谐波频率之间存在的模式来解析音高。本研究调查是否这样的机制是积极的，在语音音高控制。ERPs被记录在响应+200美分音高变化的听觉反馈的自我发声和复杂的音调与和没有F0。基本的情况下诱导ERP延迟没有差异。然而，右半球的差异被发现在N1振幅与更大的反应复杂的音调，包括基本相比，当它是失踪。与纯音相比，语音和复合音的音高变化在左半球的P1和N1波幅较短，双侧的N1和P2波幅较大。这些发现表明，大脑半球的差异，神经编码的音高的声音与失踪的基本。本研究的数据表明，右皮质听觉区，被认为是专门为频谱处理，可能会利用不同的机制来解决音高的声音与失踪的基本。与纯音相比，左半球似乎执行更快的处理，以根据复杂声音的时间变化率来解析音高。这些影响表明，在左，右半球的音高的差分神经处理，可能使音频-发声系统，以检测时间和频谱变化的听觉反馈的音高控制。
Previous studies have shown that the pitch of a sound is perceived in the absence of its fundamental frequency (F0), suggesting that a distinct mechanism may resolve pitch based on a pattern that exists between harmonic frequencies. The present study investigated whether such a mechanism is active during voice pitch control. ERPs were recorded in response to +200 cents pitch shifts in the auditory feedback of self-vocalizations and complex tones with and without the F0. The absence of the fundamental induced no difference in ERP latencies. However, a right-hemisphere difference was found in the N1 amplitudes with larger responses to complex tones that included the fundamental compared to when it was missing. The P1 and N1 latencies were shorter in the left hemisphere, and the N1 and P2 amplitudes were larger bilaterally for pitch shifts in voice and complex tones compared with pure tones. These findings suggest hemispheric differences in neural encoding of pitch in sounds with missing fundamental. Data from the present study suggest that the right cortical auditory areas, thought to be specialized for spectral processing, may utilize different mechanisms to resolve pitch in sounds with missing fundamental. The left hemisphere seems to perform faster processing to resolve pitch based on the rate of temporal variations in complex sounds compared with pure tones. These effects indicate that the differential neural processing of pitch in the left and right hemispheres may enable the audio-vocal system to detect temporal and spectral variations in the auditory feedback for vocal pitch control.
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DOI：
10.1016/j.clinph.2010.08.010
发表时间：
2011-05
期刊：
Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology
影响因子：
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作者：
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