Intersensory selective attention and temporal orienting operate in parallel and are instantiated in spatially distinct sensory and motor cortices
Intersensory selective attention and temporal orienting operate in parallel and are instantiated in spatially distinct sensory and motor cortices
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感觉间选择性注意和时间定向并行运作，并在空间上不同的感觉和运动皮层中实例化
DOI：
10.1002/hbm.22845
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发表时间：
2015
影响因子：
4.8
通讯作者：
Senkowski D
中科院分区：
文献类型：
--
作者：
Pomper U;Keil J;Foxe JJ;Senkowski D
关于即将发生的事件可能发生的感觉模态的知识允许预期的感觉间注意。关于事件确切发生时间的信息使时间定向成为可能。感官间注意和时间注意机制通常是同时部署的，但目前还不清楚这些过程是交互操作还是并行操作。在这项人类脑电图研究中，我们在相同的范例中操纵了感觉间注意和时间定向。呈现了连续的双感觉视觉触觉输入流，并且先前的听觉提示指示了参与者应该参加的模态（视觉或触觉）。通过以规则或不规则的间隔呈现刺激来逐块操纵时间定向。使用线性波束形成，我们研究了感觉和运动皮层中虚拟通道的神经振荡。这两个注意过程同时调制预期的δ和β波段振荡的功率，以及δ波段相位相干性。感觉皮层的调制反映了感觉间注意，表明了特定于形态的门控机制。运动和部分体感皮层的调制反映了时间取向，表明了一种超模态的准备机制。我们没有发现感觉间注意力和时间定向之间相互作用的证据，这表明这两种机制在感觉和运动皮层中平行作用，并且在很大程度上相互独立。©2015威利期刊公司.
Knowledge about the sensory modality in which a forthcoming event might occur permits anticipatory intersensory attention. Information as to when exactly an event occurs enables temporal orienting. Intersensory and temporal attention mechanisms are often deployed simultaneously, but as yet it is unknown whether these processes operate interactively or in parallel. In this human electroencephalography study, we manipulated intersensory attention and temporal orienting in the same paradigm. A continuous stream of bisensory visuo‐tactile inputs was presented, and a preceding auditory cue indicated to which modality participants should attend (visual or tactile). Temporal orienting was manipulated blockwise by presenting stimuli either at regular or irregular intervals. Using linear beamforming, we examined neural oscillations at virtual channels in sensory and motor cortices. Both attentional processes simultaneously modulated the power of anticipatory delta‐ and beta‐band oscillations, as well as delta‐band phase coherence. Modulations in sensory cortices reflected intersensory attention, indicative of modality‐specific gating mechanisms. Modulations in motor and partly in somatosensory cortex reflected temporal orienting, indicative of a supramodal preparatory mechanism. We found no evidence for interactions between intersensory attention and temporal orienting, suggesting that these two mechanisms act in parallel and largely independent of each other in sensory and motor cortices.Hum Brain Mapp 36:3246–3259, 2015. ©2015 Wiley Periodicals, Inc.
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