Pattern-dependent response modulations in motion-sensitive interneurons induced by natural environments

Abstract

Event Abstract Back to Event Pattern-dependent response modulations in motion-sensitive interneurons induced by natural environments Hanno G. Meyer1*, Anne-Kathrin Warzecha1, Jens P. Lindemann1, 2 and Martin Egelhaaf1, 2 1 Bielefeld University, Department of Neurobiology, Germany 2 Bielefeld University, CITEC Center of Excellence Cognitive Interaction Technology, Germany When an animal, such as a fly, moves through a natural environment, images of the surroundings move across its eyes. In the fly this image motion is evaluated by motion-sensitive neurons such as the LPTCs, i.e. wide-field neurons in the third visual neuropile. Even if the fly moves at a constant velocity, the response amplitude of these cells is usually not constant, but modulates over time in a pattern-dependent fashion. Pattern-dependent response modulations have been interpreted as 'pattern-noise', because they deteriorate the neuron's ability to provide unambiguous velocity information. On the other hand, these modulations provide the system with potentially valuable information about the textural properties of the environment. Due to the sensitivity of LPTCs to contrast and spatial structure of local features within moving scenes, LPTC responses may provide information about the depth-structure as well as textural properties of the environment during translational flight. Here we analyse a) the influence of the size and shape of receptive fields of LPTCs on the amplitude of pattern-dependent response modulations. LPTC responses were simulated using models of arrays of elementary motion detectors which have previously been employed to explain LPTC responses. In a subsequent analysis we investigate b) the textural components of natural images that drive the response of LPTCs. In order to identify the textural components of natural scenes, we perform a statistical analysis of a dataset of high dynamic range panoramic images using a neural network approach. This approach allows us to construct a filter bank representing the textural constituents of natural scenes specific for different LPTC receptive field characteristics. This filter bank is subsequently used to assess which of these constituents of natural scenes are predominantly represented in the neuronal responses of a subset of LPTCs. Keywords: calliphora, elementary motion detector, Invertebrates, motion vision, motion-sensitive interneurons, natural image statistics, neural networks, receptive fields Conference: Tenth International Congress of Neuroethology, College Park. Maryland USA, United States, 5 Aug - 10 Aug, 2012. Presentation Type: Poster Presentation (see alternatives below as well) Topic: Sensory: Vision Citation: Meyer HG, Warzecha A, Lindemann JP and Egelhaaf M (2012). Pattern-dependent response modulations in motion-sensitive interneurons induced by natural environments. Conference Abstract: Tenth International Congress of Neuroethology. doi: 10.3389/conf.fnbeh.2012.27.00082 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: 10 Apr 2012; Published Online: 07 Jul 2012. * Correspondence: Mr. Hanno G Meyer, Bielefeld University, Department of Neurobiology, Bielefeld, 33615, Germany, hanno.meyer@uni-bielefeld.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 Hanno G Meyer Anne-Kathrin Warzecha Jens P Lindemann Martin Egelhaaf Google Hanno G Meyer Anne-Kathrin Warzecha Jens P Lindemann Martin Egelhaaf Google Scholar Hanno G Meyer Anne-Kathrin Warzecha Jens P Lindemann Martin Egelhaaf PubMed Hanno G Meyer Anne-Kathrin Warzecha Jens P Lindemann Martin Egelhaaf 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.