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  Transient and steady-state response properties of movement detectors

Egelhaaf, M., & Borst, A. (1989). Transient and steady-state response properties of movement detectors. Journal of the Optical Society of America A, 6(1), 116-127. doi:10.1364/JOSAA.6.000116.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-44FD-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-44FE-0
Genre: Journal Article

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Egelhaaf, M1, 2, Author              
Borst, A1, 2, Author              
Affiliations:
1Former Department Information Processing in Insects, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497801              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: The transient and steady-state responses of movement detectors are studied at various pattern contrasts (i) by intracellularly recording from an identified movement-sensitive interneuron in the fly’s brain and (ii) by comparing these results with computer simulations of an array of movement detectors of the correlation type. At the onset of stimulus motion, the membrane potential oscillates with a frequency corresponding to the temporal frequency of the stimulus pattern before it settles at its steady-state level. Both the transient and the steady-state response amplitudes show a characteristic contrast dependence. As is shown by computer modeling, the transient behavior that we found in the experiments reflects an intrinsic property of the general scheme of movement detectors of the correlation type. To account for the contrast dependence, however, this general scheme has to be elaborated by (i) a subtraction stage, which eliminates the background light intensity from the detector input signal, and (ii) saturation characteristics in both branches of each movement-detector subunit.

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 Dates: 1989-01
 Publication Status: Published in print
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 Identifiers: DOI: 10.1364/JOSAA.6.000116
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Title: Journal of the Optical Society of America A
Source Genre: Journal
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Publ. Info: Washington, D.C. : The Society
Pages: - Volume / Issue: 6 (1) Sequence Number: - Start / End Page: 116 - 127 Identifier: ISSN: 0740-3232
CoNE: https://pure.mpg.de/cone/journals/resource/954925538151_1