Preattentive facilitation of target trajectories in a dragonfly visual neuron

Author:

Lancer Benjamin H.ORCID,Evans Bernard J. E.ORCID,Fabian Joseph M.,O’Carroll David C.,Wiederman Steven D.ORCID

Abstract

AbstractThe ability to pursue targets in visually cluttered and distraction-rich environments is critical for predators such as dragonflies. Previously, we identified Centrifugal Small-Target Motion Detector 1 (CSTMD1), a dragonfly visual neuron likely involved in such target-tracking behaviour. CSTMD1 exhibits facilitated responses to targets moving along a continuous trajectory. Moreover, CSTMD1 competitively selects a single target out of a pair. Here, we conducted in vivo, intracellular recordings from CSTMD1 to examine the interplay between facilitation and selection, in response to the presentation of paired targets. We find that neuronal responses to both individual trajectories of simultaneous, paired targets are facilitated, rather than being constrained to the single, selected target. Additionally, switches in selection elicit suppression which is likely an important attribute underlying target pursuit. However, binocular experiments reveal these results are constrained to paired targets within the same visual hemifield, while selection of a target in one visual hemifield establishes ocular dominance that prevents facilitation or response to contralaterally presented targets. These results reveal that the dragonfly brain preattentively represents more than one target trajectory, to balance between attentional flexibility and resistance against distraction.

Funder

the Australian Government Research Training Program

Vetenskapsrådet

the Swedish Foundation for International Cooperation in Research and Higher Education

Publisher

Springer Science and Business Media LLC

Subject

General Agricultural and Biological Sciences,General Biochemistry, Genetics and Molecular Biology,Medicine (miscellaneous)

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1. The hypothesis that the Wide-Field Neurons perform dynamic programming and its encoding model;2022 IEEE International Conference on Cyborg and Bionic Systems (CBS);2023-03-24

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