Event Abstract Back to Event Adaptation of the N170: Effects of stimulus category, presentation time and interstimulus interval Daniel C. Feuerriegel1*, Owen Churches2, Mark J. Kohler1 and Hannah A. Keage1 1 University of South Australia, School of Psychology, Social Work and Social Policy, Australia 2 Flinders University, School of Psychology, Australia Background Event-related potential neural adaptation studies of the N170 in face and object perception have been used to delineate the time course of neural processes in high-level vision. However, study designs have varied widely in regards to the duration of the adaptor stimulus and the interstimulus interval (ISI). If adaptor duration and ISI influence the extent of neural adaptation then these variables may explain discrepancies between past studies. We measured ERPs to faces and chairs (representing nonface objects) over different adaptor duration and ISI conditions to assess the independent and combined effects of these on the extent of neural adaptation. We also tested whether these adaptation effects were stimulus specific or reflected a general property of repeated high-level object processing. Methods A Double Pulse paradigm was used. In each an adaptor stimulus was followed by an interstimulus interval and then a test stimulus. Adaptor stimuli were presented for 200ms, 500ms or 1000ms and the ISI was set at 200ms or 500ms. Greyscale images of face and chair stimuli were presented at the adaptor and test level. Neural responses to stimuli were recorded using 64-channel EEG. N170 peak amplitude and peak latency measures were derived from responses to adaptor and test stimuli in each condition. Results Test stimulus evoked N170s were smaller (more positive) following longer adaptor stimulus durations and longer (500ms) ISIs. Face and chair test N170 amplitudes differed by adaptor duration only when adapted by the same stimulus, although this sensitivity was found in faces but not chairs when the ISI was 500ms. N170 peak latencies were slower with longer adaptor durations and shorter ISIs. N170 peak latency differences between test faces and chairs were only found with face adaptor stimuli, and only in 200ms ISI conditions and when the adaptor duration was 1000ms in the 500ms ISI condition. Discussion Findings indicate that N170 peak amplitude and peak latency are differently affected by adaptor duration and ISI. These results appear to be category selective; that is that face and chair adaptors have different adapting effects on face and chair test stimuli. Keywords: Neural adaptation, N170, face perception, repetition suppression, object perception, ERPs (Event-Related Potentials) Conference: ACNS-2013 Australasian Cognitive Neuroscience Society Conference, Clayton, Melbourne, Australia, 28 Nov - 1 Dec, 2013. Presentation Type: Poster Topic: Sensation and Perception Citation: Feuerriegel DC, Churches O, Kohler MJ and Keage HA (2013). Adaptation of the N170: Effects of stimulus category, presentation time and interstimulus interval. Conference Abstract: ACNS-2013 Australasian Cognitive Neuroscience Society Conference. doi: 10.3389/conf.fnhum.2013.212.00064 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: Mr. Daniel C Feuerriegel, University of South Australia, School of Psychology, Social Work and Social Policy, Adelaide, South Australia, Australia, dfeuerriegel@unimelb.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 Daniel C Feuerriegel Owen Churches Mark J Kohler Hannah A Keage Google Daniel C Feuerriegel Owen Churches Mark J Kohler Hannah A Keage Google Scholar Daniel C Feuerriegel Owen Churches Mark J Kohler Hannah A Keage PubMed Daniel C Feuerriegel Owen Churches Mark J Kohler Hannah A Keage 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.