The Right Angular Gyrus Combines Perceptual and Response-related Expectancies in Visual Search: TMS-EEG Evidence
The Right Angular Gyrus Combines Perceptual and Response-related Expectancies in Visual Search: TMS-EEG Evidence
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DOI：
10.1016/j.brs.2015.02.001
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发表时间：
2015-07-01
影响因子：
7.7
通讯作者：
Taylor, Paul C.
中科院分区：
文献类型：
--
作者：
Bocca, Francesca;Toellner, Thomas;Taylor, Paul C.
背景：视觉搜索性能对环境的变化很敏感。在感知和反应方面，注意力对审判历史都是敏感的。尽管这些感觉-运动相互作用的基础尚不清楚，无论是在行为上还是在神经上，来自各种方法的聚合证据表明，右角回(Rang)可能是重要的。目的/假设：本研究检验Rang是否在产生这些试验间效应中起因果作用。方法：受试者对特征单一目标进行复合任务。我们在试验间期对靶区(或对照部位，或无TMS)进行rTMS，并使用心理物理学和事件相关电位(ERP)记录来测量对行为和神经活动的影响。结果：只有当目标定义维度和反应定义特征在连续试验中都重复时，Rang TMS才能改善对即将到来的刺激的表现。Rang TMS还增加了由即将到来的刺激引起的视觉N1分量的幅度。结论：Rang在组合期望的形成中起因果作用，将先前试验的刺激特征和反应特征捆绑在一起，以优化视觉搜索性能。这支持了顶叶皮质的视觉运动理论和注意力的维度加权解释。我们建议，当前视觉搜索试验间效应的模型需要扩展，以包括代表知觉和运动试验间预期的交互成分，从而影响即将到来的试验中对刺激特征的早期分析。(C)2015 Elsevier Inc.保留所有权利。
Background: Visual search performance is sensitive to changes in the environment. Attention is sensitive to trial history, in terms of both perception and response. Although the bases of these sensorimotor interactions remain unclear, both behaviorally and neurally, converging evidence from a variety of methods indicates that the right angular gyrus (rANG) may be important.Objective/hypothesis: The present study tests whether the rANG plays a causal role in generating these inter-trial effects.Methods: Participants performed a compound task for feature singleton targets. We applied rTMS over the rANG (or a control site, or no TMS) during the inter-trial interval and measured effects both on behavior and on neural activity using psychophysics and event-related potential (ERP) recording.Results: rANG TMS during the inter-trial interval improved performance to the upcoming stimuli only when the target-defining dimension and the response-defining feature both repeated across successive trials. rANG TMS also increased the amplitude of the visual N1 component evoked by the upcoming stimuli. These effects did not occur after control TMS.Conclusion: rANG plays a causal role in the formation of combined expectancies binding together stimulus-and response-characteristics of the previous trial to optimize visual search performance. This supports a visuomotor theory of parietal cortex and the dimension weighting account of attention. We suggest current models of inter-trial effects in visual search need to be expanded to include an interactive component representing both perceptual and motoric inter-trial expectancies, affecting the early analysis of stimulus features in the upcoming trial. (C) 2015 Elsevier Inc. All rights reserved.