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. 2021 Apr 19;11:8445. doi: 10.1038/s41598-021-87835-2

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Color information contributes to large-field visual motion-induced eye movements of semi-intact preparations of Xenopus tadpoles. (A) Representative movements of the left (le) and right (ri) eye (position, black traces) evoked by alternating motion of a red-blue vertical striped pattern at constant velocity (± 10°/s; red trace). (B) Typical examples of eye movements in a given preparation (position, black traces) evoked by alternating motion of a black–white, black–blue, black–red and red–blue vertical striped pattern (see color-code) at constant velocity (± 10°/s; red traces). (C) Individual (grey traces) and averaged (black trace; n = 34) normalized OKR amplitudes evoked by a red-blue vertical striped motion pattern as function of the radiance of the red stripes; the inset illustrates a typical example of residual eye movements at the POE. (D) Bar plot depicting the response amplitude evoked by chromatic stimuli (CR) at the POE, determined individually for each animal, and control baseline amplitude (Grey). **, p < 0.01 (paired t-test). Figure assembled with Affinity Designer (version 1.8.3).