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Network adaptation improves temporal representation of naturalistic stimuli in drosophila eye: I Dynamics

Zheng, L., Nikolaev, A., Wardill, T.J., O'Kane, C.J., de Polavieja, G.G. and Juusola, M. (2009) Network adaptation improves temporal representation of naturalistic stimuli in drosophila eye: I Dynamics. Plos One , 4 (1). Art no.e4307 . ISSN 1932-6203

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Because of the limited processing capacity of eyes, retinal networks must adapt constantly to best present the ever changing visual world to the brain. However, we still know little about how adaptation in retinal networks shapes neural encoding of changing information. To study this question, we recorded voltage responses from photoreceptors (R1-R6) and their output neurons (LMCs) in the Drosophila eye to repeated patterns of contrast values, collected from natural scenes. By analyzing the continuous photoreceptor-to-LMC transformations of these graded-potential neurons, we show that the efficiency of coding is dynamically improved by adaptation. In particular, adaptation enhances both the frequency and amplitude distribution of LMC output by improving sensitivity to under-represented signals within seconds. Moreover, the signal-to-noise ratio of LMC output increases in the same time scale. We suggest that these coding properties can be used to study network adaptation using the genetic tools in Drosophila, as shown in a companion paper (Part II).

Item Type: Article
Copyright, Publisher and Additional Information: © 2009 Zheng et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Keywords: Adapted Blowfly Photoreceptors; Lateral Genicelate-Nucleus; Retinal Ganglion-Cells; Fly Compound Eye; Light Adaption; Visual-System; Information-Transmission; Graded Potentials; Pattern-Recognition; Musca-Domestica
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > School of Biological Sciences (Sheffield) > Department of Biomedical Science (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 09 Mar 2010 10:38
Last Modified: 16 Jun 2014 06:55
Published Version: http://dx.doi.org/10.1371/journal.pone.0004307
Status: Published
Publisher: Public Library Science
Refereed: Yes
Identification Number: 10.1371/journal.pone.0004307
URI: http://eprints.whiterose.ac.uk/id/eprint/10585

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