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  Neural mechanisms underlying sensitivity to reverse-phi motion in the fly

Leonhardt, A., Meier, M., Serbe, E., Eichner, H., & Borst, A. (2017). Neural mechanisms underlying sensitivity to reverse-phi motion in the fly. PLoS One, 12(12): e0189019. doi:10.1371/journal.pone.0189019.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-E415-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-E416-6
Genre: Journal Article

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journal.pone.0189019.pdf (Publisher version), 8MB
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Data Availability: Raw data and analysis code used to generate all figures are publicly accessible (https://github.com/borstlab/reversephi_paper).
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© 2017 Leonhardt 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.

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 Creators:
Leonhardt, Aljoscha1, Author              
Meier, Matthias1, Author              
Serbe, Etienne1, Author              
Eichner, Hubert1, Author              
Borst, Alexander1, Author              
Affiliations:
1Department: Circuits-Computation-Models / Borst, MPI of Neurobiology, Max Planck Society, escidoc:1113548              

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Free keywords: APPARENT MOTION; VISUAL INTERNEURONS; FUNCTIONAL SPECIALIZATION; DIRECTIONAL SELECTIVITY; TARGETED EXPRESSION; REICHARDT DETECTORS; INPUT ELEMENTS; DROSOPHILA; PERCEPTION; VISIONScience & Technology - Other Topics;
 Abstract: Optical illusions provide powerful tools for mapping the algorithms and circuits that underlie visual processing, revealing structure through atypical function. Of particular note in the study of motion detection has been the reverse-phi illusion. When contrast reversals accompany discrete movement, detected direction tends to invert. This occurs across a wide range of organisms, spanning humans and invertebrates. Here, we map an algorithmic account of the phenomenon onto neural circuitry in the fruit fly Drosophila melanogaster. Through targeted silencing experiments in tethered walking flies as well as electrophysiology and calcium imaging, we demonstrate that ON-or OFF-selective local motion detector cells T4 and T5 are sensitive to certain interactions between ON and OFF. A biologically plausible detector model accounts for subtle features of this particular form of illusory motion reversal, like the re-inversion of turning responses occurring at extreme stimulus velocities. In light of comparable circuit architecture in the mammalian retina, we suggest that similar mechanisms may apply even to human psychophysics.

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Language(s): eng - English
 Dates: 2017-12-20
 Publication Status: Published online
 Pages: 25
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Degree: -

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Title: PLoS One
Source Genre: Journal
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Publ. Info: San Francisco, CA : Public Library of Science
Pages: - Volume / Issue: 12 (12) Sequence Number: e0189019 Start / End Page: - Identifier: ISSN: 1932-6203
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/1000000000277850