How visual space maps in the optic neuropils of a crab

The Decapoda is the largest order of crustaceans, some 10,000 species having been described to date. The order includes shrimps, lobsters, crayfishes, and crabs. Most of these are highly visual animals that display complex visually guided behaviors and, consequently, large areas of their nervous sys...

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Autores principales:	Medan, Violeta, Tomsic, Daniel
Publicado:	2011
Materias:	Behavior Malacostracan Retinotopy Visual system dye tracer animal anatomy animal tissue article Brachyura Chasmagnathus granulatus crab Decapoda (Crustacea) male neuropil nonhuman optic chiasm optic neuropil predator priority journal retina vision visual field visual nervous system visual stimulation Animals Male Neuropil Optic Lobe, Nonmammalian Visual Fields Visual Pathways Visual Perception
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219967_v519_n9_p1631_DeAstrada http://hdl.handle.net/20.500.12110/paper_00219967_v519_n9_p1631_DeAstrada
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00219967_v519_n9_p1631_DeAstrada
record_format	dspace
spelling	paper:paper_00219967_v519_n9_p1631_DeAstrada2023-06-08T14:45:00Z How visual space maps in the optic neuropils of a crab Medan, Violeta Tomsic, Daniel Behavior Malacostracan Retinotopy Visual system dye tracer animal anatomy animal tissue article Brachyura Chasmagnathus granulatus crab Decapoda (Crustacea) male neuropil nonhuman optic chiasm optic neuropil predator priority journal retina vision visual field visual nervous system visual stimulation Animals Brachyura Male Neuropil Optic Lobe, Nonmammalian Visual Fields Visual Pathways Visual Perception The Decapoda is the largest order of crustaceans, some 10,000 species having been described to date. The order includes shrimps, lobsters, crayfishes, and crabs. Most of these are highly visual animals that display complex visually guided behaviors and, consequently, large areas of their nervous systems are dedicated to visual processing. However, our knowledge of the organization and functioning of the visual nervous system of these animals is still limited. Beneath the retina lie three serially arranged optic neuropils connected by two chiasmata. Here, we apply dye tracers in different areas of the retina or the optic neuropils to investigate the organization of visual space maps in the optic neuropils of the brachyuran crab Chasmagnathus granulatus. Our results reveal the way in which the visual space is represented in the three main optic neuropils of a decapod. We show that the crabs' optic chiasmata are oriented perpendicular to each other, an arrangement that seems to be unique among malacostracans. Crabs use retinal position in azimuth and elevation to categorize visual stimuli; for instance, stimuli moving above or below the horizon are interpreted as predators or conspecifics, respectively. The retinotopic maps revealed in the present study create the possibility of relating particular regions of the optic neuropils with distinct behavioral responses elicited by stimuli occurring in different regions of the visual field. © 2011 Wiley-Liss, Inc. Fil:Medan, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tomsic, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219967_v519_n9_p1631_DeAstrada http://hdl.handle.net/20.500.12110/paper_00219967_v519_n9_p1631_DeAstrada
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Behavior Malacostracan Retinotopy Visual system dye tracer animal anatomy animal tissue article Brachyura Chasmagnathus granulatus crab Decapoda (Crustacea) male neuropil nonhuman optic chiasm optic neuropil predator priority journal retina vision visual field visual nervous system visual stimulation Animals Brachyura Male Neuropil Optic Lobe, Nonmammalian Visual Fields Visual Pathways Visual Perception
spellingShingle	Behavior Malacostracan Retinotopy Visual system dye tracer animal anatomy animal tissue article Brachyura Chasmagnathus granulatus crab Decapoda (Crustacea) male neuropil nonhuman optic chiasm optic neuropil predator priority journal retina vision visual field visual nervous system visual stimulation Animals Brachyura Male Neuropil Optic Lobe, Nonmammalian Visual Fields Visual Pathways Visual Perception Medan, Violeta Tomsic, Daniel How visual space maps in the optic neuropils of a crab
topic_facet	Behavior Malacostracan Retinotopy Visual system dye tracer animal anatomy animal tissue article Brachyura Chasmagnathus granulatus crab Decapoda (Crustacea) male neuropil nonhuman optic chiasm optic neuropil predator priority journal retina vision visual field visual nervous system visual stimulation Animals Brachyura Male Neuropil Optic Lobe, Nonmammalian Visual Fields Visual Pathways Visual Perception
description	The Decapoda is the largest order of crustaceans, some 10,000 species having been described to date. The order includes shrimps, lobsters, crayfishes, and crabs. Most of these are highly visual animals that display complex visually guided behaviors and, consequently, large areas of their nervous systems are dedicated to visual processing. However, our knowledge of the organization and functioning of the visual nervous system of these animals is still limited. Beneath the retina lie three serially arranged optic neuropils connected by two chiasmata. Here, we apply dye tracers in different areas of the retina or the optic neuropils to investigate the organization of visual space maps in the optic neuropils of the brachyuran crab Chasmagnathus granulatus. Our results reveal the way in which the visual space is represented in the three main optic neuropils of a decapod. We show that the crabs' optic chiasmata are oriented perpendicular to each other, an arrangement that seems to be unique among malacostracans. Crabs use retinal position in azimuth and elevation to categorize visual stimuli; for instance, stimuli moving above or below the horizon are interpreted as predators or conspecifics, respectively. The retinotopic maps revealed in the present study create the possibility of relating particular regions of the optic neuropils with distinct behavioral responses elicited by stimuli occurring in different regions of the visual field. © 2011 Wiley-Liss, Inc.
author	Medan, Violeta Tomsic, Daniel
author_facet	Medan, Violeta Tomsic, Daniel
author_sort	Medan, Violeta
title	How visual space maps in the optic neuropils of a crab
title_short	How visual space maps in the optic neuropils of a crab
title_full	How visual space maps in the optic neuropils of a crab
title_fullStr	How visual space maps in the optic neuropils of a crab
title_full_unstemmed	How visual space maps in the optic neuropils of a crab
title_sort	how visual space maps in the optic neuropils of a crab
publishDate	2011
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219967_v519_n9_p1631_DeAstrada http://hdl.handle.net/20.500.12110/paper_00219967_v519_n9_p1631_DeAstrada
work_keys_str_mv	AT medanvioleta howvisualspacemapsintheopticneuropilsofacrab AT tomsicdaniel howvisualspacemapsintheopticneuropilsofacrab
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How visual space maps in the optic neuropils of a crab

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