Birds multiplex spectral and temporal visual information via retinal On- and Off-channels.

Birds multiplex spectral and temporal visual information via retinal On- and Off-channels.
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DOI:
10.1038/s41467-023-41032-z
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发表时间:
2023-08-31
影响因子:
16.6
通讯作者:
Baden, Tom
Baden, Tom
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Seifert, Marvin;Roberts, Paul A.;Kafetzis, George;Osorio, Daniel;Baden, Tom

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In vertebrate vision, early retinal circuits divide incoming visual information into functionally opposite elementary signals: On and Off, transient and sustained, chromatic and achromatic. Together these signals can yield an efficient representation of the scene for transmission to the brain via the optic nerve. However, this long-standing interpretation of retinal function is based on mammals, and it is unclear whether this functional arrangement is common to all vertebrates. Here we show that male poultry chicks use a fundamentally different strategy to communicate information from the eye to the brain. Rather than using functionally opposite pairs of retinal output channels, chicks encode the polarity, timing, and spectral composition of visual stimuli in a highly correlated manner: fast achromatic information is encoded by Off-circuits, and slow chromatic information overwhelmingly by On-circuits. Moreover, most retinal output channels combine On- and Off-circuits to simultaneously encode, or multiplex, both achromatic and chromatic information. Our results from birds conform to evidence from fish, amphibians, and reptiles which retain the full ancestral complement of four spectral types of cone photoreceptors. In mammals, the retina splits visual information into functionally opposite signals, but if this applies to birds is not known. Here, the authors show a different retinal functional organization in poultry chicks, where spectral and temporal information is multiplexed.
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