Auditory event-related potentials show altered hemispheric responses in dyslexia

Abstract

Event Abstract Back to Event Auditory event-related potentials show altered hemispheric responses in dyslexia Jarmo Hamalainen1*, Azizuddin Khan2 and Paavo H. Leppanen1 1 University of Jyvaskyla, Finland 2 Indian Institute of Technology Bombay, India Dyslexia is characterized by deficits in phonological processing abilities. However, it is unclear what the underlying factors for poor phonological abilities and speech sound representations are. One hypothesis suggests that individuals with dyslexia have problems in basic acoustic perception and which in turn can also cause problems in speech perception. Here basic auditory processing was assessed by auditory event-related potentials recorded for paired tones presented in an oddball paradigm in 9-year-old children with dyslexia with familial background, typically reading children at familial risk for dyslexia and control children without risk for dyslexia. The tone pairs elicited a P1-N250 complex with emerging N1-P2 complex. Control children showed larger responses over the left hemisphere at the P1 and P2 time windows for both short and long within pair intervals (WPI; 10 and 255 ms) whereas children with dyslexia showed this pattern only for the tone pairs with the long WPI. The response for the pairs with the short WPI showed equal amplitudes over both hemispheres. The findings indicate altered processing of auditory information at the right hemisphere in individuals with dyslexia. Funding: Supported by Academy of Finland (Grants 127277, 44858, 213486). Keywords: Dyslexia, Language Conference: XI International Conference on Cognitive Neuroscience (ICON XI), Palma, Mallorca, Spain, 25 Sep - 29 Sep, 2011. Presentation Type: Poster Presentation Topic: Poster Sessions: Neural Bases of Language Citation: Hamalainen J, Khan A and Leppanen PH (2011). Auditory event-related potentials show altered hemispheric responses in dyslexia. Conference Abstract: XI International Conference on Cognitive Neuroscience (ICON XI). doi: 10.3389/conf.fnhum.2011.207.00297 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 Nov 2011; Published Online: 28 Nov 2011. * Correspondence: Dr. Jarmo Hamalainen, University of Jyvaskyla, Jyvaskyla, Finland, jarmo.a.hamalainen@jyu.fi 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 Jarmo Hamalainen Azizuddin Khan Paavo H Leppanen Google Jarmo Hamalainen Azizuddin Khan Paavo H Leppanen Google Scholar Jarmo Hamalainen Azizuddin Khan Paavo H Leppanen PubMed Jarmo Hamalainen Azizuddin Khan Paavo H Leppanen 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.