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  Neural Mechanisms for Drosophila Contrast Vision

Bahl, A., Serbe, E., Meier, M., Ammer, G., & Borst, A. (2015). Neural Mechanisms for Drosophila Contrast Vision. NEURON, 88(6), 1240-1252. doi:10.1016/j.neuron.2015.11.004.

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 Creators:
Bahl, Armin1, Author              
Serbe, Etienne1, Author              
Meier, Matthias1, Author              
Ammer, Georg1, Author              
Borst, Alexander1, Author              
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1Department: Circuits-Computation-Models / Borst, MPI of Neurobiology, Max Planck Society, ou_1113548              

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Free keywords: MOTION DETECTION; VISUAL INTERNEURONS; FUNCTIONAL SPECIALIZATION; OPTIC LOBE; FLY; FIELD; PATHWAYS; CIRCUIT; SYSTEM; MELANOGASTER
 Abstract: Spatial contrast, the difference in adjacent luminance values, provides information about objects, textures, and motion and supports diverse visual behaviors. Contrast computation is therefore an essential element of visual processing. The underlying mechanisms, however, are poorly understood. In human psychophysics, contrast illusions are means to explore such computations, but humans offer limited experimental access. Via behavioral experiments in Drosophila, we find that flies are also susceptible to contrast illusions. Using genetic silencing techniques, electrophysiology, and modeling, we systematically dissect the mechanisms and neuronal correlates underlying the behavior. Our results indicate that spatial contrast computation involves lateral inhibition within the same pathway that computes motion of luminance increments (ON pathway). Yet motion-blind flies, in which we silenced downstream motion-sensitive neurons needed for optomotor behavior, have fully intact contrast responses. In conclusion, spatial contrast and motion cues are first computed by overlapping neuronal circuits which subsequently feed into parallel visual processing streams.

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Language(s): eng - English
 Dates: 2015
 Publication Status: Published in print
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Degree: -

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Title: NEURON
Source Genre: Journal
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Publ. Info: 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA : CELL PRESS
Pages: - Volume / Issue: 88 (6) Sequence Number: - Start / End Page: 1240 - 1252 Identifier: ISSN: 0896-6273