Stimulus-driven orienting of visuo-spatial attention in complex dynamic environments.

Stimulus-driven orienting of visuo-spatial attention in complex dynamic environments.
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DOI:
10.1016/j.neuron.2011.02.020
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发表时间:
2011-03-10
期刊:
影响因子:
16.2
通讯作者:
Macaluso, Emiliano
Macaluso, Emiliano
中科院分区:
医学1区
文献类型:
--
作者:
Nardo, Davide;Santangelo, Valerio;Macaluso, Emiliano

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在日常生活中,注意力在复杂和动态的环境中运作,而实验室范式通常采用简单和刻板的刺激。这项功能磁共振成像研究使用虚拟环境视频研究刺激驱动的空间注意。我们通过计算环境的显着性图和在视频中引入吸引注意力的事件来探索自下而上信号的影响。我们通过测量眼球运动来参数化这些信号对空间注意力定向的功效,并使用这些参数来分析成像数据。自下而上的信号的功效调节了背侧额顶叶区域的持续活动和腹侧注意系统的短暂激活。我们的研究结果表明,计算,行为和成像技术的结合,使生态有效的背景下研究认知功能。我们强调了刺激驱动的信号在背侧和腹侧注意系统的功效的核心作用,与背景显着性与独特的事件在两个系统中的功效的解离。
In everyday life attention operates within complex and dynamic environments, while laboratory paradigms typically employ simple and stereotyped stimuli. This fMRI study investigated stimulus-driven spatial attention using a virtual-environment video. We explored the influence of bottom-up signals by computing saliency maps of the environment and by introducing attention-grabbing events in the video. We parameterized the efficacy of these signals for the orienting of spatial attention by measuring eye movements and used these parameters to analyze the imaging data. The efficacy of bottom-up signals modulated ongoing activity in dorsal fronto-parietal regions and transient activation of the ventral attention system. Our results demonstrate that the combination of computational, behavioral, and imaging techniques enables studying cognitive functions in ecologically valid contexts. We highlight the central role of the efficacy of stimulus-driven signals in both dorsal and ventral attention systems, with a dissociation of the efficacy of background salience versus distinctive events in the two systems.
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