Bioelectrical brain effects of one's own voice identification in pitch of voice auditory feedback.
Bioelectrical brain effects of one's own voice identification in pitch of voice auditory feedback.
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DOI：
10.1016/j.neuropsychologia.2017.04.035
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发表时间：
2017-07-01
期刊：
影响因子：
2.6
通讯作者：
Larson CR
中科院分区：
文献类型：
--
作者：
Korzyukov O;Bronder A;Lee Y;Patel S;Larson CR
语音基频（F0）的控制部分依赖于预期F0电平和听觉反馈的比较。这种比较影响了“代理意识”，即SoA，通常被定义为自己行为的代理，在自我意识和社会互动中起着关键作用。SoA在一些精神疾病中是异常的。反映SoA的大脑活动知识可用于这些疾病的临床实践。研究表明，将声音反馈视为自己的声音，反映了对SoA的识别，改变了听觉感觉加工。使用声音扰动范式，我们对比了声音和生物电大脑对不同程度的听觉刺激的反应：100美分和400美分。结果表明，不同的幅度被认为是自我发声的音高误差（100美分）或外部产生的音高变化（400美分）。发声和对自我发声音调变化的神经反应被定义为那些产生小幅度的音调变化（100美分），并且对音调向上和向下变化的听觉反馈没有表现出不同的神经反应。大音高变化（400美分）的声音反应比小音高变化的声音反应要小，神经反应根据音调的上升和下降而有所不同。我们的研究结果表明，对于自我产生的声音，SoA的存在可能会改变反映音调变化方向的听觉处理差异的生物电脑反应。我们建议这种生物电响应的修改可以用作SoA的生物学指标。讨论了这种脑生物电反应改变的可能的神经元机制。
Control of voice fundamental frequency (F0) relies in part on comparison of the intended F0 level and auditory feedback. This comparison impacts “sense of agency”, or SoA, commonly defined as being the agent of one's own actions and plays a key role for self-awareness and social interactions. SoA is aberrant in several psychiatric disorders. Knowledge about brain activity reflecting SoA can be used in clinical practice for these disorders. It was shown that perception of voice feedback as one’s own voice, reflecting the recognition of SoA, alters auditory sensory processing. Using a voice perturbation paradigm we contrasted vocal and bioelectrical brain responses to auditory stimuli that differed in magnitude: 100 and 400 cents. Results suggest the different magnitudes were perceived as a pitch error in self-vocalization (100 cents) or as a pitch shift generated externally (400 cents). Vocalizations and neural responses to changes in pitch of self-vocalization were defined as those made to small magnitude pitch- shifts (100 cents) and which did not show differential neural responses to upward versus downward changes in voice pitch auditory feedback. Vocal responses to large magnitude pitch shifts (400 cents) were smaller than those made to small pitch shifts, and neural responses differed according to upwards versus downward changes in pitch. Our results suggest that the presence of SoA for self-produced sounds may modify bioelectrical brain responses reflecting differences in auditory processing of the direction of a pitch shift. We suggest that this modification of bioelectrical response can be used as a biological index of SoA. Possible neuronal mechanisms of this modification of bioelectrical brain response are discussed.
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