Physiology and morphology of sustaining and dimming neurons of the crab Chasmagnathus granulatus (Brachyura: Grapsidae)

In crustaceans, sustaining (SN) and dimming (DN) neurons are readily identified by their distinct responses to a light pulse. However, morphological identification and electrophysiological characterization of these neurons has been achieved only in the crayfish. This study provides a description of...

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Autores principales:	de Astrada, M.B., Tuthill, J.C., Tomsic, D.
Formato:	JOUR
Materias:	Crustacea Intracellular recordings Optic lobes Vision biotin drug derivative neurobiotin animal article biophysics Brachyura classification cytology excitatory postsynaptic potential histology metabolism movement perception nerve cell photostimulation physiology vision visual system Animals Biophysics Biotin Excitatory Postsynaptic Potentials Motion Perception Neurons Photic Stimulation Visual Pathways Visual Perception
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_03407594_v195_n8_p791_deAstrada
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_03407594_v195_n8_p791_deAstrada
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spelling	todo:paper_03407594_v195_n8_p791_deAstrada2023-10-03T15:26:06Z Physiology and morphology of sustaining and dimming neurons of the crab Chasmagnathus granulatus (Brachyura: Grapsidae) de Astrada, M.B. Tuthill, J.C. Tomsic, D. Crustacea Intracellular recordings Optic lobes Vision biotin drug derivative neurobiotin animal article biophysics Brachyura classification cytology excitatory postsynaptic potential histology metabolism movement perception nerve cell photostimulation physiology vision visual system Animals Biophysics Biotin Brachyura Excitatory Postsynaptic Potentials Motion Perception Neurons Photic Stimulation Visual Pathways Visual Perception In crustaceans, sustaining (SN) and dimming (DN) neurons are readily identified by their distinct responses to a light pulse. However, morphological identification and electrophysiological characterization of these neurons has been achieved only in the crayfish. This study provides a description of SNs and DNs in a second crustacean species, the crab Chasmagnathus. SNs and DNs of the crab arborize extensively in the medulla and the axons project to the midbrain. Upon a light pulse, SNs depolarize and increase the firing rate while DNs hyperpolarize and reduce firing. These responses are highly consistent and their magnitudes depend on the intensity of the light pulse. When stimulated with a wide-field motion grating, SNs respond with a modulation of the membrane potential and spike frequency. We also characterized the responses of these neurons to a rotating e-vector of polarized light. SNs show the maximum depolarization when the e-vector approaches vertical. In contrast, DNs show maximal depolarization to near horizontal e-vector orientations. The semi-terrestrial crab and the crayfish inhabit unique light environments and exhibit disparate visual behaviors. Yet, we found that the location, morphology and physiology of SNs and DNs of the crab are nearly identical to those described in the crayfish. © Springer-Verlag 2009. Fil:Tomsic, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03407594_v195_n8_p791_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	Crustacea Intracellular recordings Optic lobes Vision biotin drug derivative neurobiotin animal article biophysics Brachyura classification cytology excitatory postsynaptic potential histology metabolism movement perception nerve cell photostimulation physiology vision visual system Animals Biophysics Biotin Brachyura Excitatory Postsynaptic Potentials Motion Perception Neurons Photic Stimulation Visual Pathways Visual Perception
spellingShingle	Crustacea Intracellular recordings Optic lobes Vision biotin drug derivative neurobiotin animal article biophysics Brachyura classification cytology excitatory postsynaptic potential histology metabolism movement perception nerve cell photostimulation physiology vision visual system Animals Biophysics Biotin Brachyura Excitatory Postsynaptic Potentials Motion Perception Neurons Photic Stimulation Visual Pathways Visual Perception de Astrada, M.B. Tuthill, J.C. Tomsic, D. Physiology and morphology of sustaining and dimming neurons of the crab Chasmagnathus granulatus (Brachyura: Grapsidae)
topic_facet	Crustacea Intracellular recordings Optic lobes Vision biotin drug derivative neurobiotin animal article biophysics Brachyura classification cytology excitatory postsynaptic potential histology metabolism movement perception nerve cell photostimulation physiology vision visual system Animals Biophysics Biotin Brachyura Excitatory Postsynaptic Potentials Motion Perception Neurons Photic Stimulation Visual Pathways Visual Perception
description	In crustaceans, sustaining (SN) and dimming (DN) neurons are readily identified by their distinct responses to a light pulse. However, morphological identification and electrophysiological characterization of these neurons has been achieved only in the crayfish. This study provides a description of SNs and DNs in a second crustacean species, the crab Chasmagnathus. SNs and DNs of the crab arborize extensively in the medulla and the axons project to the midbrain. Upon a light pulse, SNs depolarize and increase the firing rate while DNs hyperpolarize and reduce firing. These responses are highly consistent and their magnitudes depend on the intensity of the light pulse. When stimulated with a wide-field motion grating, SNs respond with a modulation of the membrane potential and spike frequency. We also characterized the responses of these neurons to a rotating e-vector of polarized light. SNs show the maximum depolarization when the e-vector approaches vertical. In contrast, DNs show maximal depolarization to near horizontal e-vector orientations. The semi-terrestrial crab and the crayfish inhabit unique light environments and exhibit disparate visual behaviors. Yet, we found that the location, morphology and physiology of SNs and DNs of the crab are nearly identical to those described in the crayfish. © Springer-Verlag 2009.
format	JOUR
author	de Astrada, M.B. Tuthill, J.C. Tomsic, D.
author_facet	de Astrada, M.B. Tuthill, J.C. Tomsic, D.
author_sort	de Astrada, M.B.
title	Physiology and morphology of sustaining and dimming neurons of the crab Chasmagnathus granulatus (Brachyura: Grapsidae)
title_short	Physiology and morphology of sustaining and dimming neurons of the crab Chasmagnathus granulatus (Brachyura: Grapsidae)
title_full	Physiology and morphology of sustaining and dimming neurons of the crab Chasmagnathus granulatus (Brachyura: Grapsidae)
title_fullStr	Physiology and morphology of sustaining and dimming neurons of the crab Chasmagnathus granulatus (Brachyura: Grapsidae)
title_full_unstemmed	Physiology and morphology of sustaining and dimming neurons of the crab Chasmagnathus granulatus (Brachyura: Grapsidae)
title_sort	physiology and morphology of sustaining and dimming neurons of the crab chasmagnathus granulatus (brachyura: grapsidae)
url	http://hdl.handle.net/20.500.12110/paper_03407594_v195_n8_p791_deAstrada
work_keys_str_mv	AT deastradamb physiologyandmorphologyofsustaininganddimmingneuronsofthecrabchasmagnathusgranulatusbrachyuragrapsidae AT tuthilljc physiologyandmorphologyofsustaininganddimmingneuronsofthecrabchasmagnathusgranulatusbrachyuragrapsidae AT tomsicd physiologyandmorphologyofsustaininganddimmingneuronsofthecrabchasmagnathusgranulatusbrachyuragrapsidae
_version_	1807319379620134912

Physiology and morphology of sustaining and dimming neurons of the crab Chasmagnathus granulatus (Brachyura: Grapsidae)

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