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Spatio-temporal characterization of neuronal interference processing influenced by spatial and feature-based attention

受空间和基于特征的注意力影响的神经元干扰处理的时空特征

基本信息

批准号：
229061031
负责人：
Dr. Daniela Galashan
金额：
--
依托单位：
Abteilung für Neuropsychologie und Verhaltensneurobiologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/229061031?language=en
关键词：
Spatio temporal characterization neuronal interference

项目摘要

On the one hand, neuronal processing of the multitude of incoming information can be altered intentionally, for example by directed attentional orienting to a location in space (spatial) or to a certain color (feature-based). On the other hand, neuronal processing is influenced by the nature of sensory input, for example when competing stimuli require different reactions and one has to decide on the correct reaction. Until now, the interaction of these two processes (attentional orienting, conflict processing due to competing stimuli) has been examined predominantly at the behavioral level. In the present project we characterize the effects of spatial (experiment 1) and feature-based (experiment 2) attentional orientation on the processing of compatible, incompatible and neutral task-irrelevant stimuli in detail on a neuronal level. Thereby new insight can be gathered on the functionality of interference control mechanisms in the human brain. In both experiments magnetic resonance tomographic as well as electrophysiological data are collected and to benefit from the complementary advantages of both methods (good spatial/temporal resolution) the respective data are fed into a common analysis. By comparing the results of both experiments it can be clarified whether spatial and feature-based attention are controlled by the same interference control mechanism.

一方面，神经元对大量输入信息的处理可以被有意地改变，例如，通过将注意力定向到空间中的某个位置（空间）或某种颜色（基于特征）。另一方面，神经元的处理受到感觉输入性质的影响，例如，当相互竞争的刺激需要不同的反应时，一个人必须决定正确的反应。到目前为止，这两个过程（注意导向和竞争刺激引起的冲突处理）的相互作用主要在行为层面进行研究。在本项目中，我们在神经元水平上详细描述了空间（实验1）和基于特征（实验2）的注意取向对相容、不相容和中性任务无关刺激处理的影响。因此，可以对人类大脑中干扰控制机制的功能收集新的见解。在这两个实验中，磁共振层析成像和电生理数据被收集，并受益于两种方法的互补优势（良好的空间/时间分辨率），各自的数据被馈送到一个共同的分析。通过对比两个实验的结果，可以明确空间注意和特征注意是否受到相同的干扰控制机制的控制。