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

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons101824

Leonhardt,  Aljoscha
Department: Circuits-Computation-Models / Borst, MPI of Neurobiology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons49139

Meier,  Matthias
Department: Circuits-Computation-Models / Borst, MPI of Neurobiology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons49137

Serbe,  Etienne
Department: Circuits-Computation-Models / Borst, MPI of Neurobiology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons38813

Eichner,  Hubert
Department: Circuits-Computation-Models / Borst, MPI of Neurobiology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons38770

Borst,  Alexander
Department: Circuits-Computation-Models / Borst, MPI of Neurobiology, Max Planck Society;

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Volltexte (frei zugänglich)

journal.pone.0189019.pdf
(Verlagsversion), 8MB

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Zitation

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.


Zitierlink: http://hdl.handle.net/21.11116/0000-0000-E415-7
Zusammenfassung
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.