Robustness of the tuning of fly visual interneurons to rotatory optic flow

Karmeier K, Krapp HG, Egelhaaf M (2003)
Journal of neurophysiology 90(3): 1626-1634.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
The sophisticated receptive field organization of motion-sensitive tangential cells in the visual system of the blowfly Calliphora vicina matches the structure of particular optic flow fields. Hypotheses on the tuning of particular tangential cells to rotatory self-motion are based on local motion measurements. So far, tangential cells have never been tested with global optic flow stimuli. Therefore we measured the responses of an identifiable neuron, the V1 tangential cell, to wide-field motion stimuli mimicking optic flow fields similar to those the fly encounters during particular self-motions. The stimuli were generated by a "planetarium-projector," casting a pattern of moving light dots on a large spherical projection screen. We determined the tuning curves of the V1-cell to optic flow fields as induced by the animal during 1) rotation about horizontally aligned body axes, 2) upward/downward translation, and 3) a combination of both components. We found that the V1-cell does not respond as specifically to self-rotations, as had been concluded from its receptive field organization. The neuron responds strongly to upward translation and its tuning to rotations is much coarser than expected. The discrepancies between the responses to global optic flow and the predictions based on the receptive field organization are likely due to nonlinear integration properties of tangential neurons. Response parameters like orientation, shape, and width of the tuning curve are largely unaffected by changes in rotation velocity or a superposition of rotational and translational optic flow.
Erscheinungsjahr
2003
Zeitschriftentitel
Journal of neurophysiology
Band
90
Ausgabe
3
Seite(n)
1626-1634
ISSN
0022-3077
eISSN
1522-1598
Page URI
https://pub.uni-bielefeld.de/record/1773422

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Karmeier K, Krapp HG, Egelhaaf M. Robustness of the tuning of fly visual interneurons to rotatory optic flow. Journal of neurophysiology. 2003;90(3):1626-1634.
Karmeier, K., Krapp, H. G., & Egelhaaf, M. (2003). Robustness of the tuning of fly visual interneurons to rotatory optic flow. Journal of neurophysiology, 90(3), 1626-1634. doi:10.1152/jn.00234.2003
Karmeier, K., Krapp, H. G., and Egelhaaf, M. (2003). Robustness of the tuning of fly visual interneurons to rotatory optic flow. Journal of neurophysiology 90, 1626-1634.
Karmeier, K., Krapp, H.G., & Egelhaaf, M., 2003. Robustness of the tuning of fly visual interneurons to rotatory optic flow. Journal of neurophysiology, 90(3), p 1626-1634.
K. Karmeier, H.G. Krapp, and M. Egelhaaf, “Robustness of the tuning of fly visual interneurons to rotatory optic flow”, Journal of neurophysiology, vol. 90, 2003, pp. 1626-1634.
Karmeier, K., Krapp, H.G., Egelhaaf, M.: Robustness of the tuning of fly visual interneurons to rotatory optic flow. Journal of neurophysiology. 90, 1626-1634 (2003).
Karmeier, Katja, Krapp, Holger G., and Egelhaaf, Martin. “Robustness of the tuning of fly visual interneurons to rotatory optic flow”. Journal of neurophysiology 90.3 (2003): 1626-1634.
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