The role of complexity of the infrequently presented irrelevant stimuli in orientation

Abstract

Event Abstract Back to Event The role of complexity of the infrequently presented irrelevant stimuli in orientation I. Barkaszi1, 2*, I. Czigler1 and L. Balázs1 1 Hungarian Academy of Sciences, Institute for Psychology, Hungary 2 Debrecen University, Institute of Psychology, Hungary The orienting response is an involuntary shift of attention to new, unexpected or unpredictable stimuli, enabling the event to enter the consciousness. If the event is deemed significant, this could lead to appropriate behavioral action. The neurocognitive changes induced by the orienting response enable the organism to respond appropriately to a variety of familiar or unfamiliar environmental events. The brain electrical activity correlates of this response is a component (P3a) elicited by task irrelevant stimuli that is of maximum amplitude over the frontal/central areas with a peak latency of 300‑400 ms. This component is typically obtained in response to task irrelevant stimuli. In our experiments participants were asked to perform auditory and visual discrimination tasks. All subjects were given 3 task conditions in each modality. In the conditions 1. and 2. the tasks consisted of simple standards (80%) and targets (10%) and the task irrelevant stimuli were more complex. In condition 1. complex stimuli were similar, however in condition 2. they were different each time. In contrast in condition 3. the standards and targets were more complex and the task irrelevant infrequent stimuli were similar and more simple.The irrelevant infrequent stimuli elicited P3a component in the 1. and 2. but not in the 3. conditions.Our results show that the infrequency and the irrelevance is not enough to elicit orienting response per se, there is a significant role of complexity. Keywords: Sensory and motor activity, Neuroscience Conference: 13th Conference of the Hungarian Neuroscience Society (MITT), Budapest, Hungary, 20 Jan - 22 Jan, 2011. Presentation Type: Abstract Topic: Sensory and motor activity Citation: Barkaszi I, Czigler I and Balázs L (2011). The role of complexity of the infrequently presented irrelevant stimuli in orientation. Front. Neurosci. Conference Abstract: 13th Conference of the Hungarian Neuroscience Society (MITT). doi: 10.3389/conf.fnins.2011.84.00092 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: 03 Mar 2011; Published Online: 23 Mar 2011. * Correspondence: Dr. I. Barkaszi, Hungarian Academy of Sciences, Institute for Psychology, Budapest, Hungary, barkaszi.iren@ttk.mta.hu 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 I. Barkaszi I. Czigler L. Balázs Google I. Barkaszi I. Czigler L. Balázs Google Scholar I. Barkaszi I. Czigler L. Balázs PubMed I. Barkaszi I. Czigler L. Balázs 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.