Image motion with color contrast suffices to elicit an optokinetic reflex in Xenopus laevis tadpoles

Abstract The optokinetic reflex is a closed-loop gaze-stabilizing ocular motor reaction that minimizes residual retinal image slip during vestibulo-ocular reflexes. In experimental isolation, the reflex is usually activated by motion of an achromatic large-field visual background with strong influen...

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Autores principales:	Alexander G. Knorr, Céline M. Gravot, Stefan Glasauer, Hans Straka
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9976adc97d584ef2b3af498f0e489002
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spelling	oai:doaj.org-article:9976adc97d584ef2b3af498f0e4890022021-12-02T13:39:23ZImage motion with color contrast suffices to elicit an optokinetic reflex in Xenopus laevis tadpoles10.1038/s41598-021-87835-22045-2322https://doaj.org/article/9976adc97d584ef2b3af498f0e4890022021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87835-2https://doaj.org/toc/2045-2322Abstract The optokinetic reflex is a closed-loop gaze-stabilizing ocular motor reaction that minimizes residual retinal image slip during vestibulo-ocular reflexes. In experimental isolation, the reflex is usually activated by motion of an achromatic large-field visual background with strong influence of radiance contrast on visual motion estimation and behavioral performance. The presence of color in natural environments, however, suggests that chromatic cues of visual scenes provide additional parameters for image motion detection. Here, we employed Xenopus laevis tadpoles to study the influence of color cues on the performance of the optokinetic reflex and multi-unit optic nerve discharge during motion of a large-field visual scene. Even though the amplitude of the optokinetic reflex decreases with smaller radiance contrast, considerable residual eye movements persist at the ‘point of equiluminance’ of the colored stimuli. Given the color motion preferences of individual optic nerve fibers, the underlying computation potentially originates in retinal circuits. Differential retinal ganglion cell projections and associated ocular motor signal transformation might further reinforce the color dependency in conceptual correspondence with head/body optomotor signaling. Optokinetic reflex performance under natural light conditions is accordingly influenced by radiance contrast as well as by the color composition of the moving visual scene.Alexander G. KnorrCéline M. GravotStefan GlasauerHans StrakaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alexander G. Knorr Céline M. Gravot Stefan Glasauer Hans Straka Image motion with color contrast suffices to elicit an optokinetic reflex in Xenopus laevis tadpoles
description	Abstract The optokinetic reflex is a closed-loop gaze-stabilizing ocular motor reaction that minimizes residual retinal image slip during vestibulo-ocular reflexes. In experimental isolation, the reflex is usually activated by motion of an achromatic large-field visual background with strong influence of radiance contrast on visual motion estimation and behavioral performance. The presence of color in natural environments, however, suggests that chromatic cues of visual scenes provide additional parameters for image motion detection. Here, we employed Xenopus laevis tadpoles to study the influence of color cues on the performance of the optokinetic reflex and multi-unit optic nerve discharge during motion of a large-field visual scene. Even though the amplitude of the optokinetic reflex decreases with smaller radiance contrast, considerable residual eye movements persist at the ‘point of equiluminance’ of the colored stimuli. Given the color motion preferences of individual optic nerve fibers, the underlying computation potentially originates in retinal circuits. Differential retinal ganglion cell projections and associated ocular motor signal transformation might further reinforce the color dependency in conceptual correspondence with head/body optomotor signaling. Optokinetic reflex performance under natural light conditions is accordingly influenced by radiance contrast as well as by the color composition of the moving visual scene.
format	article
author	Alexander G. Knorr Céline M. Gravot Stefan Glasauer Hans Straka
author_facet	Alexander G. Knorr Céline M. Gravot Stefan Glasauer Hans Straka
author_sort	Alexander G. Knorr
title	Image motion with color contrast suffices to elicit an optokinetic reflex in Xenopus laevis tadpoles
title_short	Image motion with color contrast suffices to elicit an optokinetic reflex in Xenopus laevis tadpoles
title_full	Image motion with color contrast suffices to elicit an optokinetic reflex in Xenopus laevis tadpoles
title_fullStr	Image motion with color contrast suffices to elicit an optokinetic reflex in Xenopus laevis tadpoles
title_full_unstemmed	Image motion with color contrast suffices to elicit an optokinetic reflex in Xenopus laevis tadpoles
title_sort	image motion with color contrast suffices to elicit an optokinetic reflex in xenopus laevis tadpoles
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9976adc97d584ef2b3af498f0e489002
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Image motion with color contrast suffices to elicit an optokinetic reflex in Xenopus laevis tadpoles

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