Sensor and source space analysis of anticipatory spectral activity during spatial and non-spatial auditory working memory tasks

Abstract

Event Abstract Back to Event Sensor and source space analysis of anticipatory spectral activity during spatial and non-spatial auditory working memory tasks Saskia Helbling1*, Maria Rieder2, Benjamin Rahm3, Christoph Polkowski2, Michael Wibral2 and Jochen Kaiser2 1 IMP, Goethe University Frankfurt, Germany 2 Goethe University Frankfurt, Germany 3 Gutenberg University Mainz, Germany Previous studies have found task-specific gamma-band activity (GBA) in auditory ventral and dorsal pathways during working memory tasks based on auditory pattern and spatial information, respectively. Here we used magnetoencephalography to explore the role of GBA as a correlate of anticipatory processes during auditory spatial and non-spatial delayed match-to-sample tasks requiring short-term memorization of sound lateralization or frequency. To investigate task-specific anticipatory activity we assessed the preparatory phase prior to the sample stimuli. At sensor level, comparison with a passive listening control condition revealed pronounced beta synchronization at central sensors for both active tasks. Frequency-domain beamforming located this activity in motor cortex indicating a sustained beta-rebound following the motor response given in the two active tasks. Response accuracy decreased with increased beta synchronization for the lateralization but not the frequency task, suggesting interference between the motor response and auditory spatial processing in the dorsal path. In addition, we observed less GBA at posterior sensors during the lateralization task compared to the passive listening condition. Source analysis located this effect in the right cerebellum. Subsequent statistical comparisons in source space revealed that the frequency task led to higher gamma activity in the right cerebellum than the lateralization task. The cerebellum has been linked to the processing, discrimination and anticipation of sensory input, as well as to auditory working memory. Furthermore, we found differences between both tasks in areas previously linked to spatial and non-spatial auditory processing, i.e. the right temporal lobe, the parietal cortex and the prefrontal cortex. Funding: Deutsche Forschungsgemeinschaft grant (DFG KA 1493/4-1). Keywords: brain oscillations, working memory Conference: XI International Conference on Cognitive Neuroscience (ICON XI), Palma, Mallorca, Spain, 25 Sep - 29 Sep, 2011. Presentation Type: Poster Presentation Topic: Poster Sessions: Quantitative Analysis of EEG, MEG & Brain Oscillations Citation: Helbling S, Rieder M, Rahm B, Polkowski C, Wibral M and Kaiser J (2011). Sensor and source space analysis of anticipatory spectral activity during spatial and non-spatial auditory working memory tasks. Conference Abstract: XI International Conference on Cognitive Neuroscience (ICON XI). doi: 10.3389/conf.fnhum.2011.207.00130 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: 17 Nov 2011; Published Online: 28 Nov 2011. * Correspondence: Dr. Saskia Helbling, IMP, Goethe University Frankfurt, Frankfurt, Germany, helbling@med.uni-frankfurt.de 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 Saskia Helbling Maria Rieder Benjamin Rahm Christoph Polkowski Michael Wibral Jochen Kaiser Google Saskia Helbling Maria Rieder Benjamin Rahm Christoph Polkowski Michael Wibral Jochen Kaiser Google Scholar Saskia Helbling Maria Rieder Benjamin Rahm Christoph Polkowski Michael Wibral Jochen Kaiser PubMed Saskia Helbling Maria Rieder Benjamin Rahm Christoph Polkowski Michael Wibral Jochen Kaiser 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.