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

Wiederman, Steven D.; Fabian, Joseph M. LU ; Dunbier, James R. and O’Carroll, David C. LU (2017) In eLife 6.
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,... (More)

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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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
eLife
volume
6
publisher
eLife Sciences Publications LTD.
external identifiers
  • scopus:85026737434
ISSN
2050-084X
DOI
10.7554/eLife.26478
language
English
LU publication?
yes
id
93a2b44f-7622-4e98-a8cf-4c91458f8db7
date added to LUP
2018-01-24 10:13:01
date last changed
2018-08-26 05:01:29
@article{93a2b44f-7622-4e98-a8cf-4c91458f8db7,
  abstract     = {<p>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.</p>},
  articleno    = {e26478},
  author       = {Wiederman, Steven D. and Fabian, Joseph M. and Dunbier, James R. and O’Carroll, David C.},
  issn         = {2050-084X},
  language     = {eng},
  month        = {07},
  publisher    = {eLife Sciences Publications LTD.},
  series       = {eLife},
  title        = {A predictive focus of gain modulation encodes target trajectories in insect vision},
  url          = {http://dx.doi.org/10.7554/eLife.26478},
  volume       = {6},
  year         = {2017},
}