Physiology and morphology of visual movement detector neurons in a crab (Decapoda: Brachyura)

Although visually elicited behaviors have been extensively studied in crabs, their investigation at the neurophysiological level is scant. The present study is a physiological and morphological description of intracellularly recorded and dye injected visual movement detector neurons that respond to...

Descripción completa

Detalles Bibliográficos
Autores principales:	Beron De Astrada, Martin, Tomsic, Daniel
Publicado:	2002
Materias:	Chasmagnathus granulatus In vivo intracellular recordings Motion detection Visual interneurons animal article Brachyura cytology electrophysiology escape behavior male movement (physiology) nerve cell optic lobe physiology retina Animals Electrophysiology Escape Reaction Male Movement Neurons Optic Lobe Retina
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v188_n7_p539_BeronDeAstrada http://hdl.handle.net/20.500.12110/paper_03407594_v188_n7_p539_BeronDeAstrada
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_03407594_v188_n7_p539_BeronDeAstrada
record_format	dspace
spelling	paper:paper_03407594_v188_n7_p539_BeronDeAstrada2023-06-08T15:34:18Z Physiology and morphology of visual movement detector neurons in a crab (Decapoda: Brachyura) Beron De Astrada, Martin Tomsic, Daniel Chasmagnathus granulatus In vivo intracellular recordings Motion detection Visual interneurons animal article Brachyura cytology electrophysiology escape behavior male movement (physiology) nerve cell optic lobe physiology retina Animals Brachyura Electrophysiology Escape Reaction Male Movement Neurons Optic Lobe Retina Although visually elicited behaviors have been extensively studied in crabs, their investigation at the neurophysiological level is scant. The present study is a physiological and morphological description of intracellularly recorded and dye injected visual movement detector neurons that respond to the same stimulus that elicits the escape response in the crab Chasmagnathus granulatus. The neurons were investigated in intact animals. The response of movement detector neurons to the danger stimulus (an object moving above the animal) consists of a strong discharge of action potentials frequently superimposed on noisy graded potentials, whereas the response to stationary changes in illumination is weak or undetectable. The response to the moving stimulus is relatively independent of the background intensity and of the contrast between target and background. Repeated presentations of the moving stimulus produce rapid habituation of the neural response. Some of the neurons also respond to mechanical stimulation. These physiological results coincide with those from early studies on visual movement detector fibers of crustaceans achieved by extracellular recordings. However, there are no previous morphological studies of these neurons. Intracellular injection with Lucifer Yellow revealed that these neurons in Chasmagnathus arborize extensively in the internal medulla and in the lateral protocerebrum. They have their somata located in the cell body cluster laying beneath the internal medulla. Their axons project centripetally across the protocerebral tract. Fil:Berón De Astrada, M. 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. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v188_n7_p539_BeronDeAstrada http://hdl.handle.net/20.500.12110/paper_03407594_v188_n7_p539_BeronDeAstrada
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Chasmagnathus granulatus In vivo intracellular recordings Motion detection Visual interneurons animal article Brachyura cytology electrophysiology escape behavior male movement (physiology) nerve cell optic lobe physiology retina Animals Brachyura Electrophysiology Escape Reaction Male Movement Neurons Optic Lobe Retina
spellingShingle	Chasmagnathus granulatus In vivo intracellular recordings Motion detection Visual interneurons animal article Brachyura cytology electrophysiology escape behavior male movement (physiology) nerve cell optic lobe physiology retina Animals Brachyura Electrophysiology Escape Reaction Male Movement Neurons Optic Lobe Retina Beron De Astrada, Martin Tomsic, Daniel Physiology and morphology of visual movement detector neurons in a crab (Decapoda: Brachyura)
topic_facet	Chasmagnathus granulatus In vivo intracellular recordings Motion detection Visual interneurons animal article Brachyura cytology electrophysiology escape behavior male movement (physiology) nerve cell optic lobe physiology retina Animals Brachyura Electrophysiology Escape Reaction Male Movement Neurons Optic Lobe Retina
description	Although visually elicited behaviors have been extensively studied in crabs, their investigation at the neurophysiological level is scant. The present study is a physiological and morphological description of intracellularly recorded and dye injected visual movement detector neurons that respond to the same stimulus that elicits the escape response in the crab Chasmagnathus granulatus. The neurons were investigated in intact animals. The response of movement detector neurons to the danger stimulus (an object moving above the animal) consists of a strong discharge of action potentials frequently superimposed on noisy graded potentials, whereas the response to stationary changes in illumination is weak or undetectable. The response to the moving stimulus is relatively independent of the background intensity and of the contrast between target and background. Repeated presentations of the moving stimulus produce rapid habituation of the neural response. Some of the neurons also respond to mechanical stimulation. These physiological results coincide with those from early studies on visual movement detector fibers of crustaceans achieved by extracellular recordings. However, there are no previous morphological studies of these neurons. Intracellular injection with Lucifer Yellow revealed that these neurons in Chasmagnathus arborize extensively in the internal medulla and in the lateral protocerebrum. They have their somata located in the cell body cluster laying beneath the internal medulla. Their axons project centripetally across the protocerebral tract.
author	Beron De Astrada, Martin Tomsic, Daniel
author_facet	Beron De Astrada, Martin Tomsic, Daniel
author_sort	Beron De Astrada, Martin
title	Physiology and morphology of visual movement detector neurons in a crab (Decapoda: Brachyura)
title_short	Physiology and morphology of visual movement detector neurons in a crab (Decapoda: Brachyura)
title_full	Physiology and morphology of visual movement detector neurons in a crab (Decapoda: Brachyura)
title_fullStr	Physiology and morphology of visual movement detector neurons in a crab (Decapoda: Brachyura)
title_full_unstemmed	Physiology and morphology of visual movement detector neurons in a crab (Decapoda: Brachyura)
title_sort	physiology and morphology of visual movement detector neurons in a crab (decapoda: brachyura)
publishDate	2002
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v188_n7_p539_BeronDeAstrada http://hdl.handle.net/20.500.12110/paper_03407594_v188_n7_p539_BeronDeAstrada
work_keys_str_mv	AT berondeastradamartin physiologyandmorphologyofvisualmovementdetectorneuronsinacrabdecapodabrachyura AT tomsicdaniel physiologyandmorphologyofvisualmovementdetectorneuronsinacrabdecapodabrachyura
_version_	1768544086829039616

Physiology and morphology of visual movement detector neurons in a crab (Decapoda: Brachyura)

Ejemplares similares