A predictive focus of gain modulation encodes target trajectories in insect vision

ELife
Steven D WiedermanDavid C O'Carroll

Abstract

When a human catches a ball, they estimate future target location based on the current trajectory. How animals, small and large, encode such predictive processes at the single neuron level is unknown. Here we describe small target-selective neurons in predatory dragonflies that exhibit localized enhanced sensitivity for targets displaced to new locations just ahead of the prior path, with suppression elsewhere in the surround. This focused region of gain modulation is driven by predictive mechanisms, with the direction tuning shifting selectively to match the target's prior path. It involves a large local increase in contrast gain which spreads forward after a delay (e.g. an occlusion) and can even transfer between brain hemispheres, predicting trajectories moved towards the visual midline from the other eye. The tractable nature of dragonflies for physiological experiments makes this a useful model for studying the neuronal mechanisms underlying the brain's remarkable ability to anticipate moving stimuli.

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Citations

Dec 1, 2017·The Journal of Experimental Biology·Elisa RigosiDavid C O'Carroll
Oct 19, 2019·The Journal of Comparative Neurology·Joss von HadelnUwe Homberg
Apr 20, 2018·Frontiers in Neural Circuits·Jessica R KohnRudy Behnia
Jun 2, 2020·Frontiers in Computational Neuroscience·Frances S ChanceFelix Wang
Aug 10, 2019·The Journal of Experimental Biology·Joseph M FabianSteven D Wiederman
Aug 26, 2020·Current Opinion in Insect Science·Benjamin Horatio LancerSteven D Wiederman
Feb 19, 2021·Scientific Reports·Joseph M Fabian, Steven D Wiederman
Feb 26, 2020·Current Biology : CB·Vivek Nityananda
Aug 14, 2019·Current Opinion in Physiology·Eiman Azim, Kazuhiko Seki
Jun 10, 2020·Current Biology : CB·Andrew M HeinGraham K Taylor
Jan 9, 2021·Biochemical and Biophysical Research Communications·Alex M WinsorElizabeth M Jakob

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Methods Mentioned

BETA
fluorescence imaging

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