A task-irrelevant sound modulates the effects of simultaneous visual cue on visual discrimination: An fMRI study

2016 IEEE International Conference on Mechatronics and Automation Pub Date : 2016-08-01 DOI:10.1109/ICMA.2016.7558867

Hongtao Yu, Qi Li, Hongzan Sun

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引用次数: 4

Abstract

In present study, we used functional magnetic resonance imaging (fMRI) to explore the neural mechanism of how a task-irrelevant sound modulates the effects of simultaneous visual cue on visual discrimination. Behavioral results showed that response to bimodal audiovisual stimulus was significantly slower when an audiovisual stimulus was accompanied by a simultaneous visual cue than it was not accompanied. The fMRI results showed left premotor cortex was activated by unimodal visual stimulus accompanied with simultaneous visual cue. This result indicated a simultaneous visual cue provided reliable spatial information to visual stimulus, resulting in intramodal visual integration. Left inferior frontal gyrus, letft somatosensory association cortex and left supramarginal cortex were significantly activated by bimodal audiovisual stimulus accompanied with simultaneous visual cue. These activation regions indicated different roles were need for multisensory integration network. This study provides potential theory support for developing brain computer interface device or wearable intelligent device.

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任务无关的声音调节同步视觉线索对视觉辨别的影响:一项功能磁共振成像研究

本研究利用功能磁共振成像(fMRI)技术，探讨了任务无关声音调节同步视觉线索对视觉辨别影响的神经机制。行为学结果表明，当视听刺激同时伴有视觉提示时，对双峰视听刺激的反应明显慢于不伴有双峰视听刺激时。fMRI结果显示，单峰视觉刺激和同步视觉提示激活左运动前皮层。结果表明，同时存在的视觉线索为视觉刺激提供了可靠的空间信息，形成了模内视觉整合。在双峰视觉刺激下，左侧额下回、左侧体感关联皮层和左侧边缘上皮层被显著激活。这些激活区域表明多感觉统合网络需要不同的作用。本研究为开发脑机接口设备或可穿戴智能设备提供了潜在的理论支持。

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2016 IEEE International Conference on Mechatronics and Automation

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