Neuronal interaction between spatial- and feature-based attention in visual object processing

视觉对象处理中基于空间和特征的注意力之间的神经交互

• 批准号: 414151260
• 负责人: Professor Dr. Matthias M. Müller
• 金额: --
• 依托单位: School of Medicine
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/414151260?language=en
• 关键词: Neuronal; interaction; between; spatial; feature

Attention is the key mechanism to select behaviorally relevant stimuli out of the flood of possible information. Three basic selection principles, i.e. spatial-, object- and feature-based selection, were intensively investigated in the past. However, a closer look to the literature shows that these mechanisms were mostly explored in isolation with only a few attempts to discover similarities/dissimilarities or interactions between the three. Everyday experience teaches us that a constant shift between these selection principles is required to extract a coherent image of our environment. Therefore, it is surprising how little is known about the neural dynamics, coordination and interactions in this regard. On the basis of object-based attention, the proposed project will investigate the neural (temporal) dynamics when spatial- or feature-based selection criteria are applied. Own work has shown that attending to one task-relevant feature of an object does not automatically facilitate neural processing of the task-irrelevant feature that constitutes the object. Furthermore, in a different experiment we have shown that feature-based attention is obligatory and overwrites even task-demands. These and other experimental results lay ground of the proposed experiments to shed further light on the neural interactions and basic principles between object-, spatial- and feature-based selection. By means of our innovative stimulation technique, i.e. to present frequency-tagged stimuli that evoke steady state evoked potentials (SSVEPs) in the human EEG, we will be able to uncover basic neural dynamics in early visual cortex in competition for processing, including temporal dynamics thereof. The theoretical framework of all experiments is based on the "biased competition model" to explain competitive interactions.

注意是从可能的信息泛滥中选择与行为相关的刺激的关键机制。过去对三种基本选择原理，即基于对象和特征的选择，过去对过去进行了深入研究。但是，仔细观察文献表明，这些机制大多是孤立探索的，只有几次尝试发现三个机制或相互作用或相互作用。每天的经验告诉我们，这些选择原则之间需要不断的转变才能提取我们环境的连贯形象。因此，令人惊讶的是，在这方面，对神经动力学，协调和相互作用知之甚少。根据基于对象的注意，当应用空间或基于特征的选择标准时，提出的项目将研究神经（时间）动力学。自己的工作表明，参与对象的一个​​与任务相关的功能不会自动促进构成对象的任务 - 默认功能的神经处理。此外，在一个不同的实验中，我们表明基于特征的注意力是必须的，甚至覆盖了任务需求。这些和其他实验结果是提出的实验的基础，以进一步阐明对象，空间和基于特征的选择之间的神经相互作用和基本原理。通过我们的创新刺激技术，即，在人EEG中引起稳态引起的稳态势力（SSVEP）的频率标记的刺激，我们将能够在早期视觉皮层中揭示用于处理的早期视觉皮层的基本神经动态，包括其时间动力学。所有实验的理论框架都是基于“偏见竞争模型”来解释竞争相互作用的。