Inter-Mosaic Alignment of Color Sensitive Retinal Ganglion Cells

Overview

Visual information is detected and encoded in the retina through dozens of parallel pathways, with each pathway encoding a specific aspect of what we see. Each pathway is associated with a specific type of output retinal neurons, called ganglion cells. Each ganglion cell is responding to visual stimulus within its receptive field, a small area of the retina. Receptive fields of a single type of ganglion cells are organized in regular grids called mosaics, ensuring uniform coverage of the visual field. Recently, the efficient coding theory was used to predict the relative alignment of mosaics of complimentary ganglion cell types encoding ON- and OFF-set of the same visual feature. Such mosaics were predicted to be anti-aligned and this prediction was confirmed by large-scale recordings of mammalian retinal responses to visual stimulus. Both the prediction and the experiments were done with ganglion cells that are not sensitive to color. For the first time, I implemented a similar methodology to analyze data on mosaics of color sensitive ganglion cells, in particular, cells sensitive to differences between blue and yellow light. My analysis indicates that these color-sensitive mosaics are aligned, unlike the mosaics of color-blind ganglion cells. This surprising result calls for developing theoretical predictions for the alignment of color sensitive cells, and expands our understanding of how complex information is encoded by diverse neural populations.

Competition history

• CSEF 2026 Medicine & Physiology (Track 2) (Senior Division) · Entry S-21-33

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