Processing of self-initiated sound motion in the human brain
Processing of self-initiated sound motion in the human brain
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人脑中自发声音运动的处理
DOI：
10.1016/j.brainres.2021.147433
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发表时间：
2021
期刊：
影响因子：
2.9
通讯作者：
Bucher Benoit
中科院分区：
文献类型：
--
作者：
Altmann Christian F.;Yamasaki Daiki;Song Yunqing;Bucher Benoit
与我们环境中的物体相互作用通常会导致可听见的噪音。大脑对这种自发声音的反应已经被证明是衰减的，特别是用脑电图（EEG）测量的所谓N1分量。这种衰减被认为是一种内部前向模型的效应，这种模型允许取消运动命令的感觉后果。在目前的研究中，我们询问由于声音的自我启动而引起的衰减是否也会影响后来的事件相关电位-所谓的运动起始反应-这是对运动声音的反应。为了达到这个目的，志愿者们被要求向左或向右移动他们的食指，这导致了一个声音向左或向右的虚拟移动。在实验1中，通过改变耳间时间和强度差，从而改变颅内声像，用入耳式耳机诱导声音运动。我们比较了两种情况下的运动起始反应：a）一致，和B）不一致。在一致条件下，声像沿手指运动的方向移动，而在不一致条件下，声音运动与手指运动的方向相反。明确的运动起始反应与负的cN 1成分峰在约160 ms和正的cP 2成分峰在约230 ms后的运动起始获得的一致和不一致的条件。然而，运动起始反应的幅度或潜伏期没有显着差异之间的一致和不一致的条件。在实验2中，声音与扬声器，我们观察到衰减的自我诱导与外部触发的声音运动发作，但再次，一致和不一致的conditions.In总结，这两个实验表明，运动发作的反应由EEG测量可以衰减的自我产生的声音。然而，我们的研究结果并没有表明这种衰减依赖于一致的行动和声音的运动方向。
Interacting with objects in our environment usually leads to audible noise. Brain responses to such self-initiated sounds have been shown to be attenuated, in particular the so-called N1 component measured with electroencephalography (EEG). This attenuation has been proposed to be the effect of an internal forward model that allows for cancellation of the sensory consequences of a motor command.In the current study we asked whether the attenuation due to self-initiation of a sound also affects a later event-related potential – the so-called motion-onset response – that arises in response to moving sounds. To this end, volunteers were instructed to move their index fingers either left or rightward which resulted in virtual movement of a sound either to the left or to the right. In Experiment 1, sound motion was induced with in-ear head-phones by shifting interaural time and intensity differences and thus shifting the intracranial sound image. We compared the motion-onset responses under two conditions: a) congruent, and b) incongruent. In the congruent condition, the sound image moved in the direction of the finger movement, while in the incongruent condition sound motion was in the opposite direction of the finger movement. Clear motion-onset responses with a negative cN1 component peaking at about 160 ms and a positive cP2 component peaking at about 230 ms after motion-onset were obtained for both the congruent and incongruent conditions. However, the motion-onset responses did not significantly differ between congruent and incongruent conditions in amplitude or latency. In Experiment 2, in which sounds were presented with loudspeakers, we observed attenuation for self-induced versus externally triggered sound motion-onset, but again, there was no difference between congruent and incongruent conditions.In sum, these two experiments suggest that the motion-onset response measured by EEG can be attenuated for self-generated sounds. However, our result did not indicate that this attenuation depended on congruency of action and sound motion direction.
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