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What happens in between? Human oscillatory brain activity related to crossmodal spatial cueing.

Trenner, MU; Heekeren, HR; Bauer, M; Rössner, K; Wenzel, R; Villringer, A; Fahle, M; (2008) What happens in between? Human oscillatory brain activity related to crossmodal spatial cueing. PLoS ONE , 3 (1) , Article e1467. 10.1371/journal.pone.0001467. Green open access

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Abstract

Previous studies investigated the effects of crossmodal spatial attention by comparing the responses to validly versus invalidly cued target stimuli. Dynamics of cortical rhythms in the time interval between cue and target might contribute to cue effects on performance. Here, we studied the influence of spatial attention on ongoing oscillatory brain activity in the interval between cue and target onset. In a first experiment, subjects underwent periods of tactile stimulation (cue) followed by visual stimulation (target) in a spatial cueing task as well as tactile stimulation as a control. In a second experiment, cue validity was modified to be 50%, 75%, or else 25%, to separate effects of exogenous shifts of attention caused by tactile stimuli from that of endogenous shifts. Tactile stimuli produced: 1) a stronger lateralization of the sensorimotor beta-rhythm rebound (15–22 Hz) after tactile stimuli serving as cues versus not serving as cues; 2) a suppression of the occipital alpha-rhythm (7–13 Hz) appearing only in the cueing task (this suppression was stronger contralateral to the endogenously attended side and was predictive of behavioral success); 3) an increase of prefrontal gamma-activity (25–35 Hz) specifically in the cueing task. We measured cue-related modulations of cortical rhythms which may accompany crossmodal spatial attention, expectation or decision, and therefore contribute to cue validity effects. The clearly lateralized alpha suppression after tactile cues in our data indicates its dependence on endogenous rather than exogenous shifts of visuo-spatial attention following a cue independent of its modality.

Type: Article
Title: What happens in between? Human oscillatory brain activity related to crossmodal spatial cueing.
Open access status: An open access version is available from UCL Discovery
DOI: 10.1371/journal.pone.0001467
Publisher version: http://dx.doi.org/10.1371%2Fjournal.pone.0001467
Language: English
Additional information: © 2008 Trenner et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This work was supported by grants of the BMBF (Berlin NeuroImaging Center, BNIC, BMBF-DLR, FKZ 01 GO 020), Center for Advanced Imaging (CAI), and by the Kommission für wissenschaftlichen Nachwuchs of Charité Universitätsmedizin Berlin.
Keywords: tactile, visual, attention, space, EEG
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Imaging Neuroscience
URI: https://discovery.ucl.ac.uk/id/eprint/92755
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