Temporal Characteristics of Priming of Attention Shifts Are Mirrored by BOLD Response Patterns in the Frontoparietal Attention Network

• Published in: Cerebral Cortex
• Main Authors: Brinkhuis, M. A. B., Kristjansson, Arni, Harvey, Ben M, Brascamp, Jan W
• Other Authors: Sálfræðideild (HÍ), Faculty of Psychology (UI), Heilbrigðisvísindasvið (HÍ), School of Health Sciences (UI), Háskóli Íslands, University of Iceland
• Format: Article in Journal/Newspaper
• Language: English
• Published: Oxford University Press (OUP) 2019
• Subjects: Attention priming; Frontal cortex; Parietal cortex; Selective attention; Visual search; Athygli; Sjónskynjun; Iceland
• Online Access: https://hdl.handle.net/20.500.11815/2377; https://doi.org/10.1093/cercor/bhz238

Publisher's version (útgefin grein) Priming of attention shifts involves the reduction in search RTs that occurs when target location or target features repeat. We used functional magnetic resonance imaging to investigate the neural basis of such attentional priming, specifically focusing on its temporal characteristics over trial sequences. We first replicated earlier findings by showing that repetition of target color and of target location from the immediately preceding trial both result in reduced blood oxygen level-dependent (BOLD) signals in a cortical network that encompasses occipital, parietal, and frontal cortices: lag-1 repetition suppression. While such lag-1 suppression can have a number of explanations, behaviorally, the influence of attentional priming extends further, with the influence of past search trials gradually decaying across multiple subsequent trials. Our results reveal that the same regions within the frontoparietal network that show lag-1 suppression, also show longer term BOLD reductions that diminish over the course of several trial presentations, keeping pace with the decaying behavioral influence of past target properties across trials. This distinct parallel between the across-Trial patterns of cortical BOLD and search RT reductions, provides strong evidence that these cortical areas play a key role in attentional priming. Icelandic Research Fund (Rannis, #130575-051 to M.B. and J.W.B.); the ERC (grant 643636 to A.K.); the Icelandic Research Fund (#130575-051, #152427-051 and #173947-051); and the Research Fund of the University of Iceland. Netherlands Organization for Scientific Research (grant #452.17.012 to B.M.) and Portuguese Foundation for Science and Technology (grant #IF/01405/2014 to B.M.). Peer Reviewed