Distinct patterns of local oscillatory activity and functional connectivity underlie intersensory attention and temporal prediction
Distinct patterns of local oscillatory activity and functional connectivity underlie intersensory attention and temporal prediction
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DOI：
10.1016/j.cortex.2015.10.023
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发表时间：
2016-01-01
期刊：
影响因子：
3.6
通讯作者：
Senkowski, Daniel
中科院分区：
文献类型：
--
作者：
Keil, Julian;Pomper, Ulrich;Senkowski, Daniel
感觉间注意（IA）描述了我们注意一种感觉方式的刺激，而忽略其他方式的能力。时间预测（TP）描述了将注意力引导到特定时刻的过程。这两种注意机制都促进了感官刺激的处理，但目前还不清楚它们是否依赖于共同或不同的网络模式。在这项脑电图（EEG）研究中，我们提出了听觉线索，其次是视觉触觉刺激。这些线索表明参与者是否应该在视觉-触觉刺激中检测视觉或触觉目标。TP被操纵的刺激块在固定或可变的刺激间隔。我们分析了源投射振荡的功率和功能连接。我们计算图论的措施，以确定网络的基础IA和TP。与可变刺激间隔相比，当刺激以固定间隔呈现时，参与者反应更快，表明TP的促进作用。局部δ-，α-和β-波段功率调制和差异功能连接的α和β-波段的不同模式反映了IA和TP的影响。IA和TP之间的相互作用被发现在θ-带连接网络，包括额叶，躯体感觉和顶叶区域。我们的研究提供了洞察IA和TP如何动态形状振荡功率和功能连接，以促进刺激处理。(C)2015爱思唯尔有限公司版权所有。
Intersensory attention (IA) describes our ability to attend to stimuli of one sensory modality, while disregarding other modalities. Temporal prediction (TP) describes the process of directing attention to specific moments in time. Both attention mechanisms facilitate sensory stimulus processing, yet it is not understood whether they rely on common or distinct network patterns. In this electroencephalography (EEG) study, we presented auditory cues followed by visuo-tactile stimuli. The cues indicated whether participants should detect visual or tactile targets in the visuo-tactile stimuli. TP was manipulated by presenting stimuli block-wise at fixed or variable inter-stimulus intervals. We analysed power and functional connectivity of source-projected oscillations. We computed graph theoretical measures to identify networks underlying IA and TP. Participants responded faster when stimuli were presented with fixed compared to variable inter-stimulus intervals, demonstrating a facilitating effect of TP. Distinct patterns of local delta-, alpha-, and beta-band power modulations and differential functional connectivity in the alpha and beta-bands reflected the influence of IA and TP. An interaction between IA and TP was found in theta-band connectivity in a network comprising frontal, somatosensory and parietal areas. Our study provides insights into how IA and TP dynamically shape oscillatory power and functional connectivity to facilitate stimulus processing. (C) 2015 Elsevier Ltd. All rights reserved.