Prestimulus low frequency EEG affects processing outcomes in the equiprobable Go/NoGo task in healthy ageing

Abstract

Event Abstract Back to Event Prestimulus low frequency EEG affects processing outcomes in the equiprobable Go/NoGo task in healthy ageing Frances M. De Blasio1* and Robert J. Barry1 1 University of Wollongong, School of Psychology, Australia Prestimulus brain states have a significant impact on task-related processing outcomes, although little is known about the specific nature of these complex effects, or how consistent they are across the lifespan. Improved methodology is utilised to extend and clarify the pattern and nature of these relationships in the auditory equiprobable Go/NoGo paradigm, with a focus on the contributions in the lower frequency bands in young and well-functioning older adults. Prestimulus amplitudes in delta (0.5–3.5 Hz) and theta (4.0–7.5 Hz) were used to selectively sort and average the accepted Go and NoGo epochs, generating 10 sets of Go/NoGo ERPs and Go RT data for lower to higher prestimulus levels in each EEG band. ERP component amplitudes were quantified using Principal Components Analysis, and seven components were assessed: P1, N1-1, Processing Negativity (PN), P2/N2b, P3, Slow Wave (SW), and Late Positivity (LP). The pattern of prestimulus EEG band level effects was somewhat consistent with, and extends, prior work in this paradigm. Delta again generally modulated ERP component positivity, but theta produced fewer stimulus-specific effects. These effects differed topographically between the young and older adults in selected components for each sorting band. Prestimulus theta level inversely modulated Go RT variability across the young and older groups. The pattern of results is interpreted in the context of a recent sequential processing schema developed in this simple task, providing significant insight into the prestimulus brain state effects on processing outcomes, and how these change in healthy ageing. Keywords: EEG/ERP dynamics, Equiprobable auditory Go/NoGo, Principal Components Analysis (PCA), delta, theta, Healthy Ageing Conference: ASP2015 - 25th Annual Conference of the Australasian Society for Psychophysiology, Sydney, Australia, 2 Dec - 4 Dec, 2015. Presentation Type: Oral Presentation Topic: Psychophysiology Citation: De Blasio FM and Barry RJ (2015). Prestimulus low frequency EEG affects processing outcomes in the equiprobable Go/NoGo task in healthy ageing. Conference Abstract: ASP2015 - 25th Annual Conference of the Australasian Society for Psychophysiology. doi: 10.3389/conf.fnhum.2015.219.00030 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: 22 Oct 2015; Published Online: 30 Nov 2015. * Correspondence: Ms. Frances M De Blasio, University of Wollongong, School of Psychology, Wollongong, NSW, 2522, Australia, francesd@uow.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 Frances M De Blasio Robert J Barry Google Frances M De Blasio Robert J Barry Google Scholar Frances M De Blasio Robert J Barry PubMed Frances M De Blasio Robert J Barry 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.