What can evoked neural oscillations reveal about visual perception and selective attention?

Abstract

Event Abstract Back to Event What can evoked neural oscillations reveal about visual perception and selective attention? Jason B. Mattingley1* 1 The University of Queensland, Queensland Brain Institute & School of Psychology, Australia Perceptual, cognitive and motor processes often unfold over extended time periods, yet many studies in cognitive neuroscience are designed to measure brain activity in response to discrete and rather brief psychological events. Here I discuss various applications of an approach that uses electroencephalography (EEG) to measure steady-state evoked potentials (SSEPs) over prolonged timescales, from seconds to minutes. In a typical SSEP paradigm, several competing stimuli are flickered continuously, and their unique neural signatures are recovered from the EEG trace using frequency-based analyses. We have used such “frequency tagging” methods to assess various aspects of visual perception and selective attention, in health and disease. At the level of early visual perception, we have used frequency tagging to reveal the neural correlates of amodal completion of visual surfaces hidden behind occluding objects. We have used analogous approaches to show that feature-based attention spreads to ignored locations during conjunction search, but not during unique feature search, and that this spread of attention reflects active enhancement of target-coloured items at irrelevant locations. In more recent work we have employed frequency tagging to compare the influence of spatial attention on neural responses to visible and invisible phase-scrambled targets embedded in dynamic noise. Finally, we have adapted several of these paradigms to investigate anomalous visual processing in parietal-lesioned patients with unilateral spatial neglect, and in macular degeneration patients suffering from visual hallucinations. Keywords: oscillations, EEG, frequency tagging, visual completion, selective attention, Spatial neglect, Visual Hallucinations Conference: ACNS-2013 Australasian Cognitive Neuroscience Society Conference, Clayton, Melbourne, Australia, 28 Nov - 1 Dec, 2013. Presentation Type: Oral Topic: Attention Citation: Mattingley JB (2013). What can evoked neural oscillations reveal about visual perception and selective attention?. Conference Abstract: ACNS-2013 Australasian Cognitive Neuroscience Society Conference. doi: 10.3389/conf.fnhum.2013.212.00195 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 15 Oct 2013; Published Online: 25 Nov 2013. * Correspondence: Prof. Jason B Mattingley, The University of Queensland, Queensland Brain Institute & School of Psychology, Brisbane, Queensland, 4072, Australia, j.mattingley@uq.edu.au Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Jason B Mattingley Google Jason B Mattingley Google Scholar Jason B Mattingley PubMed Jason B Mattingley Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.