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http://dx.doi.org/10.1016/j.neuron.2017.12.030 | DOI Listing |
Front Cell Neurosci
March 2025
Neurosensory/Animal Navigation, Institute of Biology and Environmental Sciences, Carl von Ossietzky Universität, Oldenburg, Germany.
In the outer vertebrate retina, the visual signal is separated into intensity and wavelength information. In birds, seven types of photoreceptors (one rod, four single cones, and two members of the double cone) mediate signals to >20 types of second-order neurons, the bipolar cells and horizontal cells. Horizontal cells contribute to color and contrast processing by providing feedback signals to photoreceptors and feedforward signals to bipolar cells.
View Article and Find Full Text PDFPLoS One
September 2024
Institute of Biology, Neurobiology, Freie Universität Berlin, Berlin, Germany.
Color vision in honeybees is a well-documented perceptual phenomenon including multiple behavioral tests of trichromaticity and color opponency. Data on the combined color/space properties of high order visual neurons in the bee brain is however limited. Here we fill this gap by analyzing the activity of neurons in the anterior optic tract (AOT), a high order brain region suggested to be involved in chromatic processing.
View Article and Find Full Text PDFElife
September 2024
Department of Ophthalmology, Byers Eye Institute, Stanford University School of Medicine, Stanford, United States.
Color is an important visual feature that informs behavior, and the retinal basis for color vision has been studied across various vertebrate species. While many studies have investigated how color information is processed in visual brain areas of primate species, we have limited understanding of how it is organized beyond the retina in other species, including most dichromatic mammals. In this study, we systematically characterized how color is represented in the primary visual cortex (V1) of mice.
View Article and Find Full Text PDFJ Biol Rhythms
October 2024
Department of Ophthalmology, University of Washington, Seattle, Washington.
Front Mol Neurosci
May 2024
Department for Animal Physiology and Neurobiology, Institute of Biology I, Albert-Ludwigs-University Freiburg, Freiburg, Germany.
Dm9 neurons in have been proposed as functional homologs of horizontal cells in the outer retina of vertebrates. Here we combine genetic dissection of neuronal circuit function, two-photon calcium imaging in Dm9 and inner photoreceptors, and immunohistochemical analysis to reveal novel insights into the functional role of Dm9 in early visual processing. Our experiments show that Dm9 receive input from all four types of inner photoreceptor R7p, R7y, R8p, and R8y.
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