Hemispheric differences in auditory temporal integration as indexed by the T-complex of the auditory event-related potential

Abstract

Event Abstract Back to Event Hemispheric differences in auditory temporal integration as indexed by the T-complex of the auditory event-related potential Karen Clunies-Ross1*, Allison Fox1*, An Nguyen1, Christopher Brydges1 and Veronica Connaughton1 1 University of Western Australia, Psychology, Australia Research in auditory processing implicates the left hemisphere in tasks involving temporal processing. However, recent research indicates that both the left and right auditory cortices are involved. It is suggested that the temporal integration windows over which continuously unfolding perceptual information is combined, are different between the two hemispheres. According to the Asymmetric Sampling in Time hypothesis, the temporal integration window associated with the left hemisphere is ~ 25-50 ms in duration and the temporal integration window associated with the right hemisphere is ~ 200 ms. It was predicted that all paired tones presented with a 25 ms inter-stimulus interval (ISI) or greater, would elicit distinct responses over the left hemisphere. Paired tones presented with a 200 ms ISI would elicit distinct responses over the right hemisphere. Thirty-five undergraduate students (14 male, 21 female; M = 21.26 years, SD = 5.31 years) took part in the study. Auditory event-related potentials were recorded in response to paired-tone stimuli presented at ISIs of 50 and 200 ms. The mean amplitude of the T-complex peaks (Ta and Tb) were quantified. Over the left hemisphere, a distinct T-complex response was elicited by the second tone of the pair at 50 ms inter-stimulus intervals, whereas over the right hemisphere a distinct T-complex was only elicited by the second tone of the pair at 200 ms inter-stimulus intervals. The results suggest that the temporal integration window of the right hemisphere is longer than that of the left hemisphere as indexed by the T-complex. The findings support the Asymmetric Sampling in Time model of asymmetric temporal integration. Keywords: Temporal Integration, auditory processing, event-related potential, hemispheric asymmetry, T-complex, Asymmetric sampling in time Conference: XII International Conference on Cognitive Neuroscience (ICON-XII), Brisbane, Queensland, Australia, 27 Jul - 31 Jul, 2014. Presentation Type: Poster Topic: Sensation and Perception Citation: Clunies-Ross K, Fox A, Nguyen A, Brydges C and Connaughton V (2015). Hemispheric differences in auditory temporal integration as indexed by the T-complex of the auditory event-related potential. Conference Abstract: XII International Conference on Cognitive Neuroscience (ICON-XII). doi: 10.3389/conf.fnhum.2015.217.00173 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: Miss. Karen Clunies-Ross, University of Western Australia, Psychology, Perth, Australia, karen.clunies.ross@graduate.uwa.edu.au Dr. Allison Fox, University of Western Australia, Psychology, Perth, Australia, allison.fox@uwa.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 Karen Clunies-Ross Allison Fox An Nguyen Christopher Brydges Veronica Connaughton Google Karen Clunies-Ross Allison Fox An Nguyen Christopher Brydges Veronica Connaughton Google Scholar Karen Clunies-Ross Allison Fox An Nguyen Christopher Brydges Veronica Connaughton PubMed Karen Clunies-Ross Allison Fox An Nguyen Christopher Brydges Veronica Connaughton 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.