Neuronal correlates of cross-modality attentional competition

跨模态注意力竞争的神经关联

• 批准号: 5447421
• 负责人: Professorin Dr. Grit Hein
• 金额: --
• 依托单位: Cognition and Brain Sciences Unit
• 依托单位国家: 德国
• 项目类别: Emmy Noether International Fellowships
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5447421?language=en
• 关键词: Neuronal; correlates; cross; modality; attentional

Why is it hard to read and listen to the news at the same time, i.e. to divide attention between stimuli from different modalities? So far only very few studies investigated cross-modality attentional competition, most of them with behavioural methods. Almost nothing is known about neuronal correlates of attentional competition between, for example, visual and auditory stimuli. The results of our first functional Magnet Resonance Imaging (fMRI) study indicated that cross-modality attentional competition is correlated to a suppression of activity in set of frontoparietal regions and associated modality-specific areas. However, they did not allow us to specify the function of this frontoparietal network in different degrees and forms of attentional competition. The experiments, which are proposed in this project, address this question. They test how neuronal activity is influenced by different degrees of cross-modality and within-modality attentional competition. Thereby, the converging strength of different methods, including fMRI, patient studies and behavioural experiments are used. In particular, behavioural experiments will develop paradigms for use in fMRI and clinical populations, used respectively for characterising underlying neural processes in terms of participating brain systems. Altogether, the proposed experiments should contribute to a better understanding of attentional competition in the brain.

为什么很难同时阅读和收听新闻，即在不同模态的刺激之间分配注意力？到目前为止，只有很少的研究跨通道注意竞争，其中大多数是行为的方法。我们几乎不知道视觉和听觉刺激之间的注意力竞争的神经元相关性。我们的第一个功能性磁共振成像（fMRI）研究的结果表明，跨通道注意力竞争与一组额顶叶区域和相关的通道特异性区域的活动抑制相关。然而，他们没有让我们指定的功能，这个额顶网络在不同程度和形式的注意力竞争。本项目中提出的实验解决了这个问题。他们测试了不同程度的跨通道和通道内注意力竞争如何影响神经元活动。因此，不同的方法，包括功能磁共振成像，病人的研究和行为实验的收敛强度使用。特别是，行为实验将开发用于功能磁共振成像和临床人群的范例，分别用于表征参与大脑系统的潜在神经过程。总而言之，拟议的实验应该有助于更好地理解大脑中的注意力竞争。