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  Integrating Multiple Visual Inputs in the Fly

Hardcastle, B., Schwyn, D., Bierig, K., & Krapp, H. (2016). Integrating Multiple Visual Inputs in the Fly. Poster presented at XIIth International Congress of Neuroethology (ICN 2016), Montevideo, Uruguay.

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Hardcastle, B, Author
Schwyn, D, Author
Bierig, K1, 2, Author              
Krapp, H, Author
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1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: In blowflies, two visual systems input to the gaze stabilization system: the motion vision pathway provided by the compound eyes, and the ocelli, which signal light intensity changes in the dorsal visual hemisphere. Individually, these pathways cover different dynamic input ranges and incur different processing delays. The signals provided by these two pathways are integrated and used to effect appropriate movements of the head to stabilize gaze, but the underlying mechanisms have not yet been studied quantitatively. In behavioural experiments we simulated body roll and measured compensatory head rotations in response to oscillations of a false-horizon at up to 10 Hz. We found that the ocellar input reduces the response delay by an average of 5 ms but does not significantly affect the response gain, suggesting a non-linear integration of compound eye and ocellar signals. We are now performing intracellular recordings from descending neurons receiving input from the motion vision pathway and the ocelli in response to the same visual stimulus used in our behavioural experiments. This will allow us to study how the signals are combined to give the behavioural output observed.

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 Dates: 2016-03-31
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: HardcastleSBK2016_2
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Title: XIIth International Congress of Neuroethology (ICN 2016)
Place of Event: Montevideo, Uruguay
Start-/End Date: 2016-03-30 - 2016-04-03

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Title: XIIth International Congress of Neuroethology (ICN 2016)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 221 Identifier: -