PDF(Pubmed)
Abstract：
Visual inhibition of return (IOR) is a mechanism for preventing attention from returning to previously examined spatial locations. Previous studies have found that auditory stimuli presented simultaneously with a visual target can reduce or even eliminate the visual IOR. However, the mechanism responsible for decreased visual IOR accompanied by auditory stimuli is unclear. Using functional magnetic resonance imaging, we aimed to investigate how auditory stimuli reduce visual IOR. Behaviorally, we found that the visual IOR accompanying auditory stimuli was significant but smaller than the visual IOR. Neurally, only in the validly cued trials, the superior temporal gyrus showed increased neural coupling with the intraparietal sulcus, presupplementary motor area, and some other areas in audiovisual conditions compared with visual conditions. These results suggest that the reduction in visual IOR by the simultaneous auditory stimuli may be due to a dual mechanism: rescuing the suppressed visual salience and facilitating response initiation. Our results support crossmodal interactions can occur across multiple neural levels and cognitive processing stages. This study provides a new perspective for understanding attention-orienting networks and response initiation based on crossmodal information.
摘要：
视觉返回抑制(IOR)是防止注意力返回到先前检查的空间位置的机制。先前的研究已经发现,与视觉目标同时呈现的听觉刺激可以减少甚至消除视觉IOR。然而,视觉IOR降低伴随听觉刺激的机制尚不清楚.使用功能磁共振成像，我们旨在研究听觉刺激如何降低视觉IOR。行为上,我们发现伴随听觉刺激的视觉IOR显著,但小于视觉IOR.神经上,只有在有效的审判中，颞上回显示与顶内沟的神经耦合增加，预补充电机区域,和其他一些领域的视听条件与视觉条件相比。这些结果表明，同时听觉刺激降低视觉IOR可能是由于双重机制：挽救被抑制的视觉显著性并促进反应启动。我们的结果支持跨模态交互可以发生在多个神经水平和认知处理阶段。本研究为理解基于跨模态信息的注意力导向网络和响应发起提供了新的视角。
