Suppression of the auditory N1 event-related potential component with unpredictable self-initiated tones: Evidence for internal forward models with dynamic stimulation
Suppression of the auditory N1 event-related potential component with unpredictable self-initiated tones: Evidence for internal forward models with dynamic stimulation
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DOI：
10.1016/j.ijpsycho.2008.06.005
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发表时间：
2008-11-01
影响因子：
3
通讯作者：
Schroeger, Erich
中科院分区：
文献类型：
--
作者：
Baess, Pamela;Jacobsen, Thomas;Schroeger, Erich
在内部运行的正向模型机制使有机体能够区分自己行为的感觉后果和其他感觉事件。本研究比较了自我启动音调的加工和外部启动但完全相同的音调的加工。在不同的条件下，声音的频率和起始点要么是可预测的，要么是不可预测的。即使受试者不能预测特定的频率或声音开始，自我启动的ERP的NI分量相对于外部启动的ERP的NI分量的幅度也显著减弱。这些结果支持内部前向模型机制，该机制动态地预测一个人自己的运动行为的感觉后果，即使面对关于声音的频率和其开始的不确定。此外，当频率不可预测时，衰减效应会减弱，这表明更容易在具有准确预知的情况下区分自发出的声音。(C)2008爱思唯尔B.V.保留所有权利。
internally operating forward model mechanisms enable the organism to discriminate the sensory consequences of one's own actions from other sensory events. The present event-related potential (ERP) study compared the processing of self-initiated tones with the processing of externally-initiated but otherwise identical tones. In different conditions, frequency and onset of the sound were either predictable or unpredictable. The amplitudes of the NI component of the ERP for the self-initiated relative to the ones for externally-initiated sounds were significantly attenuated even when the particular frequency or sound onset could not be predicted by the subject. These results support internal forward model mechanisms which dynamically predict the sensorial consequences of ones own motor acts even in face of uncertainties with respect to the frequency of the sound and its onset. Moreover, the attenuation effect was reduced when the frequency was unpredictable suggesting that it is easier to discriminate a self-initiated sound with exact foreknowledge. (C) 2008 Elsevier B.V. All rights reserved.