The present study investigates hemispheric asymmetry of the ERPs and low-frequency oscillatory responses evoked in both hemispheres of the brain by the sound stimuli with delayed onset of motion. EEG was recorded for three patterns of sound motion produced by changes in interaural time differences. Event-related spectral perturbation (ERSP) and inter-trial phase coherence (ITC) were computed from the time-frequency decomposition of EEG signals. The participants either read books of their choice (passive listening) or indicated the sound trajectories perceived using a graphic tablet (active listening). Our goal was to find out whether the lateralization of the motion-onset response (MOR) and oscillatory responses to sound motion were more consistent with the right-hemispheric dominance, contralateral or neglect model of interhemispheric asymmetry. Apparent dominance of the right hemisphere was found only in the ERSP responses. Stronger contralaterality of the left hemisphere corresponding to the "neglect model" of asymmetry was shown by the MOR components and by the phase coherence of the delta-alpha oscillations. Velocity and attention did not change consistently the interhemispheric asymmetry of both the MOR and the oscillatory responses. Our findings demonstrate how the lateralization pattern shown by the MOR potential was interrelated with that of the motion-related single-trial measures.

中文翻译：

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大脑对听觉运动反应的侧向化：一项使用单试验分析的研究

本研究调查了 ERP 的半球不对称性和由延迟运动开始的声音刺激在大脑两个半球引起的低频振荡反应。记录由耳间时间差变化产生的三种声音运动模式的脑电图。事件相关的频谱扰动 (ERSP) 和试验间相位相干 (ITC) 是从 EEG 信号的时频分解中计算出来的。参与者要么阅读他们选择的书籍（被动聆听），要么使用图形输入板指示感知的声音轨迹（主动聆听）。我们的目标是找出运动开始反应 (MOR) 的偏侧化和对声音运动的振荡反应是否与大脑半球间不对称的右半球优势、对侧或忽略模型更一致。仅在 ERSP 反应中发现右半球的明显优势。MOR 组件和 delta-alpha 振荡的相位相干性显示了与不对称的“忽视模型”相对应的左半球更强的对侧性。速度和注意力并没有始终如一地改变铁道部和振荡反应的半球间不对称性。我们的研究结果表明，MOR 电位显示的侧化模式与运动相关的单试验测量值是如何相互关联的。速度和注意力并没有始终如一地改变铁道部和振荡反应的半球间不对称性。我们的研究结果表明，MOR 电位显示的侧化模式与运动相关的单试验测量值是如何相互关联的。速度和注意力并没有始终如一地改变铁道部和振荡反应的半球间不对称性。我们的研究结果表明，MOR 电位显示的侧化模式与运动相关的单试验测量值是如何相互关联的。