A unified mechanism for innate and learned visual landmark guidance in the insect central complex.

Insects can navigate efficiently in both novel and familiar environments, and this requires flexiblity in how they are guided by sensory cues. A prominent landmark, for example, can elicit strong innate behaviours (attraction or menotaxis) but can also be used, after learning, as a specific directio...

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Autores principales:	Roman Goulard, Cornelia Buehlmann, Jeremy E Niven, Paul Graham, Barbara Webb
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/3b43fb0632ad47d3a08282ee906e4f50
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spelling	oai:doaj.org-article:3b43fb0632ad47d3a08282ee906e4f502021-12-02T19:57:44ZA unified mechanism for innate and learned visual landmark guidance in the insect central complex.1553-734X1553-735810.1371/journal.pcbi.1009383https://doaj.org/article/3b43fb0632ad47d3a08282ee906e4f502021-09-01T00:00:00Zhttps://doi.org/10.1371/journal.pcbi.1009383https://doaj.org/toc/1553-734Xhttps://doaj.org/toc/1553-7358Insects can navigate efficiently in both novel and familiar environments, and this requires flexiblity in how they are guided by sensory cues. A prominent landmark, for example, can elicit strong innate behaviours (attraction or menotaxis) but can also be used, after learning, as a specific directional cue as part of a navigation memory. However, the mechanisms that allow both pathways to co-exist, interact or override each other are largely unknown. Here we propose a model for the behavioural integration of innate and learned guidance based on the neuroanatomy of the central complex (CX), adapted to control landmark guided behaviours. We consider a reward signal provided either by an innate attraction to landmarks or a long-term visual memory in the mushroom bodies (MB) that modulates the formation of a local vector memory in the CX. Using an operant strategy for a simulated agent exploring a simple world containing a single visual cue, we show how the generated short-term memory can support both innate and learned steering behaviour. In addition, we show how this architecture is consistent with the observed effects of unilateral MB lesions in ants that cause a reversion to innate behaviour. We suggest the formation of a directional memory in the CX can be interpreted as transforming rewarding (positive or negative) sensory signals into a mapping of the environment that describes the geometrical attractiveness (or repulsion). We discuss how this scheme might represent an ideal way to combine multisensory information gathered during the exploration of an environment and support optimal cue integration.Roman GoulardCornelia BuehlmannJeremy E NivenPaul GrahamBarbara WebbPublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Computational Biology, Vol 17, Iss 9, p e1009383 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5
spellingShingle	Biology (General) QH301-705.5 Roman Goulard Cornelia Buehlmann Jeremy E Niven Paul Graham Barbara Webb A unified mechanism for innate and learned visual landmark guidance in the insect central complex.
description	Insects can navigate efficiently in both novel and familiar environments, and this requires flexiblity in how they are guided by sensory cues. A prominent landmark, for example, can elicit strong innate behaviours (attraction or menotaxis) but can also be used, after learning, as a specific directional cue as part of a navigation memory. However, the mechanisms that allow both pathways to co-exist, interact or override each other are largely unknown. Here we propose a model for the behavioural integration of innate and learned guidance based on the neuroanatomy of the central complex (CX), adapted to control landmark guided behaviours. We consider a reward signal provided either by an innate attraction to landmarks or a long-term visual memory in the mushroom bodies (MB) that modulates the formation of a local vector memory in the CX. Using an operant strategy for a simulated agent exploring a simple world containing a single visual cue, we show how the generated short-term memory can support both innate and learned steering behaviour. In addition, we show how this architecture is consistent with the observed effects of unilateral MB lesions in ants that cause a reversion to innate behaviour. We suggest the formation of a directional memory in the CX can be interpreted as transforming rewarding (positive or negative) sensory signals into a mapping of the environment that describes the geometrical attractiveness (or repulsion). We discuss how this scheme might represent an ideal way to combine multisensory information gathered during the exploration of an environment and support optimal cue integration.
format	article
author	Roman Goulard Cornelia Buehlmann Jeremy E Niven Paul Graham Barbara Webb
author_facet	Roman Goulard Cornelia Buehlmann Jeremy E Niven Paul Graham Barbara Webb
author_sort	Roman Goulard
title	A unified mechanism for innate and learned visual landmark guidance in the insect central complex.
title_short	A unified mechanism for innate and learned visual landmark guidance in the insect central complex.
title_full	A unified mechanism for innate and learned visual landmark guidance in the insect central complex.
title_fullStr	A unified mechanism for innate and learned visual landmark guidance in the insect central complex.
title_full_unstemmed	A unified mechanism for innate and learned visual landmark guidance in the insect central complex.
title_sort	unified mechanism for innate and learned visual landmark guidance in the insect central complex.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/3b43fb0632ad47d3a08282ee906e4f50
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A unified mechanism for innate and learned visual landmark guidance in the insect central complex.

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