ERPs in Young and Older Adults in the Equiprobable Auditory Go/NoGo Task

Abstract

Event Abstract Back to Event ERPs in Young and Older Adults in the Equiprobable Auditory Go/NoGo Task Robert Barry1*, Frances De Blasio1 and Adele Cave1 1 University of Wollongong, School of Psychology, Australia Based on principal components analysis (PCA) decomposition of event-related potentials (ERPs) from a healthy university student sample, we recently proposed a processing schema in the equiprobable auditory Go/NoGo task. Early sensory components, such as the N1, mark the beginning of identification of the stimulus as Go vs. NoGo, leading to separate processing chains. Categorisation of the stimulus as "NoGo" is associated with a frontal N2b, fronto-central P3a, and an enhanced Late Positivity (LP); categorisation as "Go" is associated with a posterior N2c and P3b, and classic Slow Wave (SW), representing directed, response-related processing. We have verified this schema in other samples of young adults, and found a comparable processing sequence in a child sample. This study sought to compare these differential processing chains in young and well-functioning older adults. Our young sample included 22 right-handed university students (5 male/17 female) with an age range of 18.8-24.5 (M = 20.3) years. The older group consisted of 22 hand- and gender-matched independent-living adults with an age range of 59.8-74.8 (M = 68.3) years. We presented 4 stimulus blocks each containing 75 Go and 75 NoGo tone stimuli in random order. Mean Go and NoGo ERPs from each group had substantial latency differences, and hence were subjected to separate temporal PCAs with unrestricted VARIMAX rotation. In the young, six components explained 91.5 % of the variance and were identified (in temporal order) as N1-1, Processing Negativity (PN), P2/N2b, P3a, SW and a LP. In the older adults, five components explained 91.3 % of the variance and were identified (in temporal order) as N1-1, P2, P3a, P3b, and SW. Despite the differences in their identified components, each group displayed differential responsivity to Go vs. NoGo. The patterns of results lend support to our proposed processing schema in the young, and provide evidence for a similar processing schema in older adults. Keywords: Ageing, event-related potentials (ERPs), Principal Components Analysis (PCA), Auditory equiprobable Go/NoGo task, Sequential processing schema Conference: XII International Conference on Cognitive Neuroscience (ICON-XII), Brisbane, Queensland, Australia, 27 Jul - 31 Jul, 2014. Presentation Type: Poster Topic: Cognition and Executive Processes Citation: Barry R, De Blasio F and Cave A (2015). ERPs in Young and Older Adults in the Equiprobable Auditory Go/NoGo Task. Conference Abstract: XII International Conference on Cognitive Neuroscience (ICON-XII). doi: 10.3389/conf.fnhum.2015.217.00048 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: 19 Feb 2015; Published Online: 24 Apr 2015. * Correspondence: Prof. Robert Barry, University of Wollongong, School of Psychology, Wollongong, Australia, rbarry@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 Robert Barry Frances De Blasio Adele Cave Google Robert Barry Frances De Blasio Adele Cave Google Scholar Robert Barry Frances De Blasio Adele Cave PubMed Robert Barry Frances De Blasio Adele Cave 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.