Looming detection by identified visual interneurons during larval development of the locust Locusta migratoria

Autores
Simmons, P.J.; Sztarker, J.; Rind, F.C.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Insect larvae clearly react to visual stimuli, but the ability of any visual neuron in a newly hatched insect to respond selectively to particular stimuli has not been directly tested. We characterised a pair of neurons in locust larvae that have been extensively studied in adults, where they are known to respond selectively to objects approaching on a collision course: the lobula giant motion detector (LGMD) and its postsynaptic partner, the descending contralateral motion detector (DCMD). Our physiological recordings of DCMD axon spikes reveal that at the time of hatching, the neurons already respond selectively to objects approaching the locust and they discriminate between stimulus approach speeds with differences in spike frequency. For a particular approaching stimulus, both the number and peak frequency of spikes increase with instar. In contrast, the number of spikes in responses to receding stimuli decreases with instar, so performance in discriminating approaching from receding stimuli improves as the locust goes through successive moults. In all instars, visual movement over one part of the visual field suppresses a response to movement over another part. Electron microscopy demonstrates that the anatomical substrate for the selective response to approaching stimuli is present in all larval instars: small neuronal processes carrying information from the eye make synapses both onto LGMD dendrites and with each other, providing pathways for lateral inhibition that shape selectivity for approaching objects. © 2013. Published by The Company of Biologists Ltd.
Fil:Sztarker, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
J. Exp. Biol. 2013;216(12):2266-2275
Materia
Development
Insect
Larva
Looming
Synapse
Vision
animal
article
development
electrophysiology
growth, development and aging
insect
interneuron
larva
Locusta migratoria
looming
movement perception
optic lobe
photostimulation
physiology
synapse
transmission electron microscopy
ultrastructure
vision
visual system
development
insect
larva
looming
synapse
vision
Animals
Electrophysiology
Interneurons
Larva
Locusta migratoria
Microscopy, Electron, Transmission
Motion Perception
Optic Lobe, Nonmammalian
Photic Stimulation
Visual Pathways
Acrididae
Arthropoda
Hexapoda
Locusta migratoria
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
paperaa:paper_00220949_v216_n12_p2266_Simmons

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oai_identifier_str paperaa:paper_00220949_v216_n12_p2266_Simmons
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repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling Looming detection by identified visual interneurons during larval development of the locust Locusta migratoriaSimmons, P.J.Sztarker, J.Rind, F.C.DevelopmentInsectLarvaLoomingSynapseVisionanimalarticledevelopmentelectrophysiologygrowth, development and aginginsectinterneuronlarvaLocusta migratorialoomingmovement perceptionoptic lobephotostimulationphysiologysynapsetransmission electron microscopyultrastructurevisionvisual systemdevelopmentinsectlarvaloomingsynapsevisionAnimalsElectrophysiologyInterneuronsLarvaLocusta migratoriaMicroscopy, Electron, TransmissionMotion PerceptionOptic Lobe, NonmammalianPhotic StimulationVisual PathwaysAcrididaeArthropodaHexapodaLocusta migratoriaInsect larvae clearly react to visual stimuli, but the ability of any visual neuron in a newly hatched insect to respond selectively to particular stimuli has not been directly tested. We characterised a pair of neurons in locust larvae that have been extensively studied in adults, where they are known to respond selectively to objects approaching on a collision course: the lobula giant motion detector (LGMD) and its postsynaptic partner, the descending contralateral motion detector (DCMD). Our physiological recordings of DCMD axon spikes reveal that at the time of hatching, the neurons already respond selectively to objects approaching the locust and they discriminate between stimulus approach speeds with differences in spike frequency. For a particular approaching stimulus, both the number and peak frequency of spikes increase with instar. In contrast, the number of spikes in responses to receding stimuli decreases with instar, so performance in discriminating approaching from receding stimuli improves as the locust goes through successive moults. In all instars, visual movement over one part of the visual field suppresses a response to movement over another part. Electron microscopy demonstrates that the anatomical substrate for the selective response to approaching stimuli is present in all larval instars: small neuronal processes carrying information from the eye make synapses both onto LGMD dendrites and with each other, providing pathways for lateral inhibition that shape selectivity for approaching objects. © 2013. Published by The Company of Biologists Ltd.Fil:Sztarker, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_00220949_v216_n12_p2266_SimmonsJ. Exp. Biol. 2013;216(12):2266-2275reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-09-29T13:43:01Zpaperaa:paper_00220949_v216_n12_p2266_SimmonsInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-09-29 13:43:02.065Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv Looming detection by identified visual interneurons during larval development of the locust Locusta migratoria
title Looming detection by identified visual interneurons during larval development of the locust Locusta migratoria
spellingShingle Looming detection by identified visual interneurons during larval development of the locust Locusta migratoria
Simmons, P.J.
Development
Insect
Larva
Looming
Synapse
Vision
animal
article
development
electrophysiology
growth, development and aging
insect
interneuron
larva
Locusta migratoria
looming
movement perception
optic lobe
photostimulation
physiology
synapse
transmission electron microscopy
ultrastructure
vision
visual system
development
insect
larva
looming
synapse
vision
Animals
Electrophysiology
Interneurons
Larva
Locusta migratoria
Microscopy, Electron, Transmission
Motion Perception
Optic Lobe, Nonmammalian
Photic Stimulation
Visual Pathways
Acrididae
Arthropoda
Hexapoda
Locusta migratoria
title_short Looming detection by identified visual interneurons during larval development of the locust Locusta migratoria
title_full Looming detection by identified visual interneurons during larval development of the locust Locusta migratoria
title_fullStr Looming detection by identified visual interneurons during larval development of the locust Locusta migratoria
title_full_unstemmed Looming detection by identified visual interneurons during larval development of the locust Locusta migratoria
title_sort Looming detection by identified visual interneurons during larval development of the locust Locusta migratoria
dc.creator.none.fl_str_mv Simmons, P.J.
Sztarker, J.
Rind, F.C.
author Simmons, P.J.
author_facet Simmons, P.J.
Sztarker, J.
Rind, F.C.
author_role author
author2 Sztarker, J.
Rind, F.C.
author2_role author
author
dc.subject.none.fl_str_mv Development
Insect
Larva
Looming
Synapse
Vision
animal
article
development
electrophysiology
growth, development and aging
insect
interneuron
larva
Locusta migratoria
looming
movement perception
optic lobe
photostimulation
physiology
synapse
transmission electron microscopy
ultrastructure
vision
visual system
development
insect
larva
looming
synapse
vision
Animals
Electrophysiology
Interneurons
Larva
Locusta migratoria
Microscopy, Electron, Transmission
Motion Perception
Optic Lobe, Nonmammalian
Photic Stimulation
Visual Pathways
Acrididae
Arthropoda
Hexapoda
Locusta migratoria
topic Development
Insect
Larva
Looming
Synapse
Vision
animal
article
development
electrophysiology
growth, development and aging
insect
interneuron
larva
Locusta migratoria
looming
movement perception
optic lobe
photostimulation
physiology
synapse
transmission electron microscopy
ultrastructure
vision
visual system
development
insect
larva
looming
synapse
vision
Animals
Electrophysiology
Interneurons
Larva
Locusta migratoria
Microscopy, Electron, Transmission
Motion Perception
Optic Lobe, Nonmammalian
Photic Stimulation
Visual Pathways
Acrididae
Arthropoda
Hexapoda
Locusta migratoria
dc.description.none.fl_txt_mv Insect larvae clearly react to visual stimuli, but the ability of any visual neuron in a newly hatched insect to respond selectively to particular stimuli has not been directly tested. We characterised a pair of neurons in locust larvae that have been extensively studied in adults, where they are known to respond selectively to objects approaching on a collision course: the lobula giant motion detector (LGMD) and its postsynaptic partner, the descending contralateral motion detector (DCMD). Our physiological recordings of DCMD axon spikes reveal that at the time of hatching, the neurons already respond selectively to objects approaching the locust and they discriminate between stimulus approach speeds with differences in spike frequency. For a particular approaching stimulus, both the number and peak frequency of spikes increase with instar. In contrast, the number of spikes in responses to receding stimuli decreases with instar, so performance in discriminating approaching from receding stimuli improves as the locust goes through successive moults. In all instars, visual movement over one part of the visual field suppresses a response to movement over another part. Electron microscopy demonstrates that the anatomical substrate for the selective response to approaching stimuli is present in all larval instars: small neuronal processes carrying information from the eye make synapses both onto LGMD dendrites and with each other, providing pathways for lateral inhibition that shape selectivity for approaching objects. © 2013. Published by The Company of Biologists Ltd.
Fil:Sztarker, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description Insect larvae clearly react to visual stimuli, but the ability of any visual neuron in a newly hatched insect to respond selectively to particular stimuli has not been directly tested. We characterised a pair of neurons in locust larvae that have been extensively studied in adults, where they are known to respond selectively to objects approaching on a collision course: the lobula giant motion detector (LGMD) and its postsynaptic partner, the descending contralateral motion detector (DCMD). Our physiological recordings of DCMD axon spikes reveal that at the time of hatching, the neurons already respond selectively to objects approaching the locust and they discriminate between stimulus approach speeds with differences in spike frequency. For a particular approaching stimulus, both the number and peak frequency of spikes increase with instar. In contrast, the number of spikes in responses to receding stimuli decreases with instar, so performance in discriminating approaching from receding stimuli improves as the locust goes through successive moults. In all instars, visual movement over one part of the visual field suppresses a response to movement over another part. Electron microscopy demonstrates that the anatomical substrate for the selective response to approaching stimuli is present in all larval instars: small neuronal processes carrying information from the eye make synapses both onto LGMD dendrites and with each other, providing pathways for lateral inhibition that shape selectivity for approaching objects. © 2013. Published by The Company of Biologists Ltd.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12110/paper_00220949_v216_n12_p2266_Simmons
url http://hdl.handle.net/20.500.12110/paper_00220949_v216_n12_p2266_Simmons
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv J. Exp. Biol. 2013;216(12):2266-2275
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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