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• W2095537595 startingPage "e8992" @default.
• W2095537595 abstract "The avian retina possesses one of the most sophisticated cone photoreceptor systems among vertebrates. Birds have five types of cones including four single cones, which support tetrachromatic color vision and a double cone, which is thought to mediate achromatic motion perception. Despite this richness, very little is known about the spatial organization of avian cones and its adaptive significance. Here we show that the five cone types of the chicken independently tile the retina as highly ordered mosaics with a characteristic spacing between cones of the same type. Measures of topological order indicate that double cones are more highly ordered than single cones, possibly reflecting their posited role in motion detection. Although cones show spacing interactions that are cell type-specific, all cone types use the same density-dependent yardstick to measure intercone distance. We propose a simple developmental model that can account for these observations. We also show that a single parameter, the global regularity index, defines the regularity of all five cone mosaics. Lastly, we demonstrate similar cone distributions in three additional avian species, suggesting that these patterning principles are universal among birds. Since regular photoreceptor spacing is critical for uniform sampling of visual space, the cone mosaics of the avian retina represent an elegant example of the emergence of adaptive global patterning secondary to simple local interactions between individual photoreceptors. Our results indicate that the evolutionary pressures that gave rise to the avian retina's various adaptations for enhanced color discrimination also acted to fine-tune its spatial sampling of color and luminance." @default.
• W2095537595 created "2016-06-24" @default.
• W2095537595 creator A5057676273 @default.
• W2095537595 creator A5060159232 @default.
• W2095537595 creator A5065197916 @default.
• W2095537595 date "2010-02-01" @default.
• W2095537595 modified "2023-10-12" @default.
• W2095537595 title "Avian Cone Photoreceptors Tile the Retina as Five Independent, Self-Organizing Mosaics" @default.
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• W2095537595 doi "https://doi.org/10.1371/journal.pone.0008992" @default.
• W2095537595 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2813877" @default.
• W2095537595 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20126550" @default.
• W2095537595 hasPublicationYear "2010" @default.
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