Multisensory Interactions Elicited by Audiovisual Stimuli Presented Peripherally in a Visual Attention Task: A Behavioral and Event-Related Potential Study in Humans
Multisensory Interactions Elicited by Audiovisual Stimuli Presented Peripherally in a Visual Attention Task: A Behavioral and Event-Related Potential Study in Humans
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DOI：
10.1097/wnp.0b013e3181c298b1
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发表时间：
2009-12
影响因子：
2.4
通讯作者：
Jinglong Wu;Qi Li;Ou Bai;T. Touge
中科院分区：
文献类型：
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作者：
Jinglong Wu;Qi Li;Ou Bai;T. Touge
我们应用行为和事件相关电位测量来研究视听(AV)刺激在视觉注意任务中诱发的人类多感觉交互作用，在视觉注意任务中，偶尔伴随着视觉刺激的是无关的听觉刺激。一系列视觉、听觉和视听刺激随机呈现给受试者的左侧或右侧；受试者秘密地注意左侧或右侧的视觉刺激，并对一侧的视觉目标迅速做出反应。行为学结果显示，对视听刺激的反应比单纯对视觉刺激的反应更快、更准确。识别出三个与房室相互作用有关的事件相关电位成分：(1)右侧颞区，约200至220毫秒；(2)中央内侧区，约290至310毫秒；(3)左侧和右侧腹侧颞区，约290至310毫秒。我们发现，这些交互作用的发生略晚于先前发表的AV交互作用研究中报道的，在这些研究中，AV刺激被集中呈现。我们的结果表明，刺激的视网膜位置影响在视觉注意任务的认知加工的后期阶段发生的视听交互作用。
We applied behavioral and event-related potential measurements to study human multisensory interactions induced by audiovisual (AV) stimuli presented peripherally in a visual attention task in which an irrelevant auditory stimulus occasionally accompanied the visual stimulus. A stream of visual, auditory, and AV stimuli was randomly presented to the left or right side of the subjects; subjects covertly attended to the visual stimuli on either the left or right side and promptly responded to visual targets on that side. Behavioral results showed that responses to AV stimuli were faster and more accurate than those to visual stimuli only. Three event-related potential components related to AV interactions were identified: (1) over the right temporal area, approximately 200 to 220 milliseconds; (2) over the centromedial area, approximately 290 to 310 milliseconds; and (3) over the left and right ventral temporal area, approximately 290 to 310 milliseconds. We found that these interaction effects occurred slightly later than those reported in previously published AV interaction studies in which AV stimuli were presented centrally. Our results suggest that the retinotopic location of stimuli affects AV interactions occurring at later stages of cognitive processing in response to a visual attention task.