INTERACTION OF EMOTIONAL PERCEPTION AND VISUAL ATTENTION

情感感知和视觉注意力的相互作用

• 批准号: 7364903
• 负责人: LUIZ PESSOA
• 金额: $ 18.15万
• 依托单位: TRUSTEES OF INDIANA UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-06-01 至 2008-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7364903
• 关键词: amygdala; attention; awareness; behavior test; behavioral /social science research tag; clinical research; emotions; functional magnetic resonance imaging; human subject; neural information processing; occipital lobe /cortex; perception; prefrontal lobe /cortex; psychophysiology; sensory signal detection; suggestion; temporal lobe /cortex

DESCRIPTION (provided by applicant): The objective of the present application is to understand the mechanisms of interaction between emotional perception and visual attention. The central hypothesis is that the processing of emotional stimuli requires processing resources that depend on attention and therefore does not occur automatically. We also hypothesize that emotional stimuli have a competitive advantage over neutral ones. Our hypotheses are based, in part, upon our recent fMRI findings that differential responses to emotional faces are abolished when subjects are engaged in a concurrent, demanding task, even though the faces were in the center of the visual field. We will test our hypotheses by pursuing three specific aims, which will employ a combination of behavioral and fMRI studies. In all aims, we will attempt to identify the brain networks underlying interactions between emotional perception and attention. Aim #1: Determine the extent to which aware emotional perception depends on attention. We expect that the extent to which emotional stimuli are processed, even in the amygdala, depends on the extent to which processing resources are consumed by concurrent tasks. Aim #2: Determine the extent to which unaware emotional perception depends on attention. The working hypothesis for this aim, based on our recent results, is that even the processing of stimuli that subjects are unaware of ("subliminal" perception) requires attentional resources. Aim #3: Determine how emotional processing guides attention and perception. The working hypothesis for this aim is that emotional processing biases perception, such that emotional stimuli are prioritized (this is expected when sufficient processing resources are available). Moreover, we hypothesize that such competitive advantage is directly linked to the modulation of cortical activation that is observed when subjects view emotional images. Our long-range goal is to contribute to a better understanding of the basic mechanisms by which emotional and cognitive brain systems interact in the generation of complex behavior.

描述（由申请人提供）：本申请的目的是理解情绪感知和视觉注意之间的相互作用机制。核心假设是，情绪刺激的处理需要依赖于注意力的处理资源，因此不会自动发生。我们还假设情绪刺激比中性刺激具有竞争优势。我们的假设部分是基于我们最近的功能磁共振成像研究结果，即当受试者同时从事一项要求很高的任务时，对情绪化面孔的差异反应就会消失，即使面孔位于视野的中心。我们将通过追求三个具体目标来测试我们的假设，这将采用行为和功能磁共振成像研究的组合。在所有的目标中，我们将试图识别情绪感知和注意力之间相互作用的大脑网络。目标1：确定有意识的情绪感知在多大程度上依赖于注意力。我们认为，情绪刺激被处理的程度，甚至在杏仁核中，取决于处理资源被并发任务消耗的程度。目标2：确定无意识的情绪感知在多大程度上取决于注意力。基于我们最近的研究结果，这个目标的工作假设是，即使是受试者没有意识到的刺激（“阈下”感知）的处理也需要注意力资源。目标3：确定情绪处理如何引导注意力和感知。这一目标的工作假设是，情绪处理偏见的看法，使情绪刺激的优先级（这是预期时，有足够的处理资源）。此外，我们假设这种竞争优势直接与受试者观看情绪图像时观察到的皮层激活的调制有关。我们的长期目标是更好地理解情感和认知大脑系统在复杂行为产生中相互作用的基本机制。