Electrical neuroimaging reveals content-specific effects of threat in primary visual cortex and fronto-parietal attentional networks
Electrical neuroimaging reveals content-specific effects of threat in primary visual cortex and fronto-parietal attentional networks
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DOI：
10.1016/j.neuroimage.2014.04.064
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发表时间：
2014-09
期刊：
影响因子：
5.7
通讯作者：
V. Rossi;G. Pourtois
中科院分区：
文献类型：
--
作者：
V. Rossi;G. Pourtois
虽然预期焦虑对注意力的影响通常被认为在很大程度上保持不变，但文献中不同的发现表明，根据其内容和原因，可能会出现对注意力控制和早期感觉加工的不同调节作用。在交叉设计中，我们使用电子神经成像和心理生理学来检验假设，即在健康参与者中短暂诱导的不同类型的预期焦虑（身体和心理）对调节注意力控制的大脑系统具有可分离的影响。注意控制对应于维持有效的目标导向处理的能力（由P300 ERP成分和注意网络的激活所指示），以及在早期感觉皮层中过滤不相关刺激的能力（C1成分，在V1中指示注意门控）。结果表明，虽然心理社会威胁与知觉负荷非常相似，主要导致V1中更强的门控，但身体威胁导致额顶叶注意网络中目标导向的处理受损，以及V1过滤功能下降。这些结果表明，预期焦虑是多方面的，不同类型的预期焦虑对注意控制和早期视觉加工有不同的影响。
Whereas effects of anticipatory anxiety on attention are usually assumed to remain largely undifferentiated, discrepant findings in the literature suggest that, depending on its content and causes, different modulatory effects on attention control and early sensory processing may arise. Using electrical neuroimaging and psychophysiology in a cross-over design, we tested the hypothesis that different types of anticipatory anxiety (bodily vs. psychological), transiently induced in healthy participants, had dissociable effects on brain systems regulating attention control. Attention control corresponded to the ability to maintain efficient goal-directed processing (indexed by the P300 ERP component and by activations in the attentional networks), as well as the ability to filter out irrelevant stimuli in early sensory cortex (C1 component, indexing attentional gating in V1). Results showed that while psychosocial threat, very much like perceptual load, primarily led to a stronger gating in V1, bodily threat resulted in impaired goal-directed processing within the fronto-parietal attentional network, as well as decreased filtering in V1. These results suggest that anticipatory anxiety is multifaceted, exerting different effects on attention control and early visual processing depending on its sub-type.