Error-dependent modulation of speech-induced auditory suppression for pitch-shifted voice feedback.
Error-dependent modulation of speech-induced auditory suppression for pitch-shifted voice feedback.
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DOI：
10.1186/1471-2202-12-54
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发表时间：
2011-06-06
期刊：
影响因子：
2.4
通讯作者：
Larson CR
中科院分区：
文献类型：
--
作者：
Behroozmand R;Larson CR
关于预期感觉反馈(传出副本)的运动驱动预测被认为在认识自我产生的运动动作的感觉后果方面发挥了重要作用。在听觉系统中，这种效应被认为导致了对发声过程中传出副本所预测的自我发出的声音的感觉神经反应的抑制，而不是被动地听相同的自我发声的回放。在本研究中，在主动发声和被动收听回放的过程中，记录了5种不同幅度(0、+50、+100、+200和+400美分)的音调上移刺激(PSS)对事件相关电位(ERPs)的反应。结果表明，在发声过程中，未改变的声音反馈对N1成分的抑制最大(PSS：0美分)，随着PSS的大小增加到200美分，N1成分的抑制程度变小，并在400美分的刺激下几乎完全消除。本研究的结果表明，大脑利用运动预测(传出副本)来确定传入刺激的来源，并最大限度地抑制对未改变的自我发声反馈的听觉反应。减少50美分、100美分和200美分的抑制，以及消除400美分的音调变化的语音听觉反馈，支持了这样的观点，即运动驱动的语音反馈抑制导致了自我发声和非自我发声的明显不同的感觉神经处理。与外部产生的声音相比，该特征可以使音频-发声系统能够更有效地检测和纠正自产生的音调的反馈中的意外错误。
The motor-driven predictions about expected sensory feedback (efference copies) have been proposed to play an important role in recognition of sensory consequences of self-produced motor actions. In the auditory system, this effect was suggested to result in suppression of sensory neural responses to self-produced voices that are predicted by the efference copies during vocal production in comparison with passive listening to the playback of the identical self-vocalizations. In the present study, event-related potentials (ERPs) were recorded in response to upward pitch shift stimuli (PSS) with five different magnitudes (0, +50, +100, +200 and +400 cents) at voice onset during active vocal production and passive listening to the playback. Results indicated that the suppression of the N1 component during vocal production was largest for unaltered voice feedback (PSS: 0 cents), became smaller as the magnitude of PSS increased to 200 cents, and was almost completely eliminated in response to 400 cents stimuli. Findings of the present study suggest that the brain utilizes the motor predictions (efference copies) to determine the source of incoming stimuli and maximally suppresses the auditory responses to unaltered feedback of self-vocalizations. The reduction of suppression for 50, 100 and 200 cents and its elimination for 400 cents pitch-shifted voice auditory feedback support the idea that motor-driven suppression of voice feedback leads to distinctly different sensory neural processing of self vs. non-self vocalizations. This characteristic may enable the audio-vocal system to more effectively detect and correct for unexpected errors in the feedback of self-produced voice pitch compared with externally-generated sounds.
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影响因子：
3.7
作者：
Fu, Cynthia H. Y.;Vythelingum, Goparlen N.;McGuire, Philip K.
通讯作者：
McGuire, Philip K.
影响因子：
3.2
作者：
Maidhof, Clemens;Vavatzanidis, Niki;Koelsch, Stefan
通讯作者：
Koelsch, Stefan
影响因子：
3.7
作者：
MCCARTHY, G;DONCHIN, E
通讯作者：
DONCHIN, E
影响因子：
3.2
作者：
Blakemore, SJ;Frith, CD;Wolpert, DM
通讯作者：
Wolpert, DM
影响因子：
3.2
作者：
Behroozmand R;Liu H;Larson CR
通讯作者：
Larson CR