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- W4289774620 abstract "Topographic sensory representations often do not scale proportionally to the size of their input regions, with some expanded and others contracted. In vision, the foveal representation is magnified cortically, as are the fingertips in touch. What principles drive this allocation, and how should receptor density, for example, the high innervation of the fovea or the fingertips, and stimulus statistics, for example, the higher contact frequencies on the fingertips, contribute? Building on work in efficient coding, we address this problem using linear models that optimally decorrelate the sensory signals. We introduce a sensory bottleneck to impose constraints on resource allocation and derive the optimal neural allocation. We find that bottleneck width is a crucial factor in resource allocation, inducing either expansion or contraction. Both receptor density and stimulus statistics affect allocation and jointly determine convergence for wider bottlenecks. Furthermore, we show a close match between the predicted and empirical cortical allocations in a well-studied model system, the star-nosed mole. Overall, our results suggest that the strength of cortical magnification depends on resource limits." @default.
- W4289774620 created "2022-08-04" @default.
- W4289774620 creator A5043641917 @default.
- W4289774620 creator A5048386542 @default.
- W4289774620 creator A5080534172 @default.
- W4289774620 date "2022-08-04" @default.
- W4289774620 modified "2023-09-24" @default.
- W4289774620 title "Expansion and contraction of resource allocation in sensory bottlenecks" @default.
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- W4289774620 doi "https://doi.org/10.7554/elife.70777" @default.
- W4289774620 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35924884" @default.