Hierarchical coupling of neuronal oscillations and their role in sensory processing

Abstract

Event Abstract Back to Event Hierarchical coupling of neuronal oscillations and their role in sensory processing P. Lakatos1, 2*, G. Karmos2, 3 and C E E Schroeder1, 4 1 Nathan Kline Institute, United States 2 Hungarian Academy of Sciences, Hungary 3 Péter Pázmány Catholic University, Hungary 4 Columbia University College of Physicians and Surgeons, United States The role of neuronal oscillations in brain operations has been debated since the discovery of the electroencephalogram. Mounting evidence indicates that a key functional property of neuronal oscillations is the rhythmic shifting of excitability in local neuronal ensembles. Since changes in excitability play a key role in cortical operations, it feasible to think that oscillations play an indispensable role in sensory processing. To optimize the processing of rhythmic stimulus sequences occurring on multiple temporal scales in the world around us, spontaneous neuronal ensemble oscillations (1) must cover a wide range of frequencies, and (2) external or internal events must be able to interact with them. We analyzed laminar profiles of synaptic activity (current source density) and multiunit activity sampled during linear array multielectrode penetrations of primary auditory, visual and somatosensory cortices in awake macaques. We found that (1) intracortical oscillations are simultaneously present at multiple time-scales and are hierarchically organized. This oscillatory hierarchy controls baseline excitability and thus stimulus-related responses in a neuronal ensemble. (2) Non-specific inputs driven by sensory or motor events can reset the phase of oscillations in multiple frequency bands. By analyzing the role of intracortical oscillations in multisensory interactions and intermodal selective attention, we were able to show that modulation of the temporal structure of oscillatory activity in sensory cortices plays an instrumental role in conveying top-down and bottom-up influences on sensory processing. Conference: 10th International Conference on Cognitive Neuroscience, Bodrum, Turkey, 1 Sep - 5 Sep, 2008. Presentation Type: Oral Presentation Topic: Symposium 7: Putative mechanisms of high frequency oscillation with evidence from different species Citation: Lakatos P, Karmos G and Schroeder C (2008). Hierarchical coupling of neuronal oscillations and their role in sensory processing. Conference Abstract: 10th International Conference on Cognitive Neuroscience. doi: 10.3389/conf.neuro.09.2009.01.035 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: 27 Nov 2008; Published Online: 27 Nov 2008. * Correspondence: P. Lakatos, Nathan Kline Institute, Orangeburg, United States, plakatos@nki.rfmh.org 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 P. Lakatos G. Karmos C E E Schroeder Google P. Lakatos G. Karmos C E E Schroeder Google Scholar P. Lakatos G. Karmos C E E Schroeder PubMed P. Lakatos G. Karmos C E E Schroeder 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.