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Neural circuitry for stimulus selection in the zebrafish visual system

机译：用于斑马鱼视觉系统中刺激选择的神经电路

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摘要

When navigating the environment, animals need to prioritize responses to the most relevant stimuli. Although a theoretical framework for selective visual attention exists, its circuit implementation has remained obscure. Here we investigated how larval zebrafish select between simultaneously presented visual stimuli. We found that a mix of winner-take-all (WTA) and averaging strategies best simulates behavioral responses. We identified two circuits whose activity patterns predict the relative saliencies of competing visual objects. Stimuli presented to only one eye are selected by WTA computation in the inner retina. Binocularly presented stimuli, on the other hand, are processed by reciprocal, bilateral connections between the nucleus isthmi (NI) and the tectum. This interhemispheric computation leads to WTA or averaging responses. Optogenetic stimulation and laser ablation of NI neurons disrupt stimulus selection and behavioral action selection. Thus, depending on the relative locations of competing stimuli, a combination of retinotectal and isthmotectal circuits enables selective visual attention.
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  • 来源
    《Neuron》 |2021年第5期|共24页
  • 作者

    Fernandes Antonio M.; Mearns Duncan S.; Donovan Joseph C.; Larsch Johannes; Helmbrecht Thomas O.; Koelsch Yvonne; Laurell Eva; Kawakami Koichi; dal Maschio Marco; Baier Herwig;

  • 作者单位

    Max Planck Inst Neurobiol Dept Genes Circuits Behav D-82152 Martinsried Germany;

    Max Planck Inst Neurobiol Dept Genes Circuits Behav D-82152 Martinsried Germany;

    Max Planck Inst Neurobiol Dept Genes Circuits Behav D-82152 Martinsried Germany;

    Max Planck Inst Neurobiol Dept Genes Circuits Behav D-82152 Martinsried Germany;

    Max Planck Inst Neurobiol Dept Genes Circuits Behav D-82152 Martinsried Germany;

    Max Planck Inst Neurobiol Dept Genes Circuits Behav D-82152 Martinsried Germany;

    Max Planck Inst Neurobiol Dept Genes Circuits Behav D-82152 Martinsried Germany;

    SOKENDAI Grad Univ Adv Studies Dept Genet Natl Inst Genet Lab Mol &

    Dev Biol Mishima Shizuoka;

    Max Planck Inst Neurobiol Dept Genes Circuits Behav D-82152 Martinsried Germany;

    Max Planck Inst Neurobiol Dept Genes Circuits Behav D-82152 Martinsried Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 神经病学;
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