Organization of the torus longitudinalis in the rainbow trout (Oncorhynchus mykiss): An immunohistochemical study of the GABAergic system and a DiI tract‐tracing study
Identifieur interne : 001321 ( Istex/Corpus ); précédent : 001320; suivant : 001322Organization of the torus longitudinalis in the rainbow trout (Oncorhynchus mykiss): An immunohistochemical study of the GABAergic system and a DiI tract‐tracing study
Auteurs : M Nica Folgueira ; Catalina Sueiro ; Isabel Rodríguez-Moldes ; Julián Yá Ez ; Ram N Anad NSource :
- Journal of Comparative Neurology [ 0021-9967 ] ; 2007-07-10.
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Abstract
The torus longitudinalis (TL) is a tectum‐associated structure of actinopterygian fishes. The organization of the TL of rainbow trout was studied with Nissl staining, Golgi methods, immunocytochemistry with antibodies to γ‐aminobutyric acid (GABA), glutamic acid decarboxylase (GAD), and the GABAA receptor subunits δ and β2/β3, and with tract tracing methods. Two types of neuron were characterized: medium‐sized GABAergic neurons and small GABA‐negative granule cells. GABAA receptor subunit δ‐like immunoreactivity delineated two different TL regions, ventrolateral and central. Small GABAergic cells were also observed in marginal and periventricular strata of the optic tectum. These results indicate the presence of local GABAergic inhibitory circuits in the TL system. For tract‐tracing, a lipophilic dye (DiI) was applied to the TL and to presumed toropetal nuclei or toral targets. Toropetal neurons were observed in the optic tectum, in pretectal (central, intermediate, and paracommissural) nuclei, in the subvalvular nucleus, and associated with the pretectocerebellar tract. Torofugal fibers were numerous in the stratum marginale of the optic tectum. Toropetal pretectal nuclei also project to the cerebellum, and a few TL cells project to the cerebellar corpus. The pyramidal cells of the trout tectum were also studied by Golgi methods and local DiI labeling. The connections of trout TL revealed here were more similar to those recently reported in carp and holocentrids (Ito et al. [2003] J. Comp. Neurol. 457:202–211; Xue et al. [2003] J. Comp. Neurol. 462:194–212), than to those reported in earlier studies. However, important differences in organization of toropetal nuclei were noted between salmonids and these other teleosts. J. Comp. Neurol. 503:348–370, 2007. © 2007 Wiley‐Liss, Inc.
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DOI: 10.1002/cne.21363
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Compostela, 15706 Santiago de Compostela, Spain</mods:affiliation></affiliation></author><author><name sortKey="Rodriguez Oldes, Isabel" sort="Rodriguez Oldes, Isabel" uniqKey="Rodriguez Oldes I" first="Isabel" last="Rodríguez-Moldes">Isabel Rodríguez-Moldes</name><affiliation><mods:affiliation>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</mods:affiliation></affiliation></author><author><name sortKey="Ya Ez, Julian" sort="Ya Ez, Julian" uniqKey="Ya Ez J" first="Julián" last="Yá Ez">Julián Yá Ez</name><affiliation><mods:affiliation>Department of Cell and Molecular Biology, University of A Coruña, 15007‐A Coruña, Spain</mods:affiliation></affiliation></author><author><name sortKey="Anad N, Ram N" sort="Anad N, Ram N" uniqKey="Anad N R" first="Ram N" last="Anad N">Ram N Anad N</name><affiliation><mods:affiliation>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, 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sortKey="Folgueira, M Nica" sort="Folgueira, M Nica" uniqKey="Folgueira M" first="M Nica" last="Folgueira">M Nica Folgueira</name><affiliation><mods:affiliation>Department of Cell and Molecular Biology, University of A Coruña, 15007‐A Coruña, Spain</mods:affiliation></affiliation><affiliation><mods:affiliation>Current Address: Department of Anatomy and Developmental Biology, University College London, London WC1E 6BT, UK</mods:affiliation></affiliation></author><author><name sortKey="Sueiro, Catalina" sort="Sueiro, Catalina" uniqKey="Sueiro C" first="Catalina" last="Sueiro">Catalina Sueiro</name><affiliation><mods:affiliation>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</mods:affiliation></affiliation></author><author><name sortKey="Rodriguez Oldes, Isabel" sort="Rodriguez Oldes, Isabel" uniqKey="Rodriguez Oldes I" first="Isabel" last="Rodríguez-Moldes">Isabel Rodríguez-Moldes</name><affiliation><mods:affiliation>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</mods:affiliation></affiliation></author><author><name sortKey="Ya Ez, Julian" sort="Ya Ez, Julian" uniqKey="Ya Ez J" first="Julián" last="Yá Ez">Julián Yá Ez</name><affiliation><mods:affiliation>Department of Cell and Molecular Biology, University of A Coruña, 15007‐A Coruña, Spain</mods:affiliation></affiliation></author><author><name sortKey="Anad N, Ram N" sort="Anad N, Ram N" uniqKey="Anad N R" first="Ram N" last="Anad N">Ram N Anad N</name><affiliation><mods:affiliation>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</mods:affiliation></affiliation><affiliation><mods:affiliation>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, 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Neurol.</title><idno type="ISSN">0021-9967</idno><idno type="eISSN">1096-9861</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2007-07-10">2007-07-10</date><biblScope unit="volume">503</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="348">348</biblScope><biblScope unit="page" to="370">370</biblScope></imprint><idno type="ISSN">0021-9967</idno></series><idno type="istex">64718A97B48636BBA402A06632D7E5332ADBD167</idno><idno type="DOI">10.1002/cne.21363</idno><idno type="ArticleID">CNE21363</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0021-9967</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>GABA</term><term>GABAA receptors</term><term>connections</term><term>optic tectum</term><term>pretectum</term><term>teleosts</term><term>torus longitudinalis</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="fr">The torus longitudinalis (TL) is a tectum‐associated structure of actinopterygian fishes. The organization of the TL of rainbow trout was studied with Nissl staining, Golgi methods, immunocytochemistry with antibodies to γ‐aminobutyric acid (GABA), glutamic acid decarboxylase (GAD), and the GABAA receptor subunits δ and β2/β3, and with tract tracing methods. Two types of neuron were characterized: medium‐sized GABAergic neurons and small GABA‐negative granule cells. GABAA receptor subunit δ‐like immunoreactivity delineated two different TL regions, ventrolateral and central. Small GABAergic cells were also observed in marginal and periventricular strata of the optic tectum. These results indicate the presence of local GABAergic inhibitory circuits in the TL system. For tract‐tracing, a lipophilic dye (DiI) was applied to the TL and to presumed toropetal nuclei or toral targets. Toropetal neurons were observed in the optic tectum, in pretectal (central, intermediate, and paracommissural) nuclei, in the subvalvular nucleus, and associated with the pretectocerebellar tract. Torofugal fibers were numerous in the stratum marginale of the optic tectum. Toropetal pretectal nuclei also project to the cerebellum, and a few TL cells project to the cerebellar corpus. The pyramidal cells of the trout tectum were also studied by Golgi methods and local DiI labeling. The connections of trout TL revealed here were more similar to those recently reported in carp and holocentrids (Ito et al. [2003] J. Comp. Neurol. 457:202–211; Xue et al. [2003] J. Comp. Neurol. 462:194–212), than to those reported in earlier studies. However, important differences in organization of toropetal nuclei were noted between salmonids and these other teleosts. J. Comp. Neurol. 503:348–370, 2007. © 2007 Wiley‐Liss, Inc.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Mónica Folgueira</name><affiliations><json:string>Department of Cell and Molecular Biology, University of A Coruña, 15007‐A Coruña, Spain</json:string><json:string>Current Address: Department of Anatomy and Developmental Biology, University College London, London WC1E 6BT, UK</json:string></affiliations></json:item><json:item><name>Catalina Sueiro</name><affiliations><json:string>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</json:string></affiliations></json:item><json:item><name>Isabel Rodríguez‐Moldes</name><affiliations><json:string>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</json:string></affiliations></json:item><json:item><name>Julián Yáñez</name><affiliations><json:string>Department of Cell and Molecular Biology, University of A Coruña, 15007‐A Coruña, Spain</json:string></affiliations></json:item><json:item><name>Ramón Anadón</name><affiliations><json:string>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</json:string><json:string>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>torus longitudinalis</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>GABA</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>GABAA receptors</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>pretectum</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>optic tectum</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>connections</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>teleosts</value></json:item></subject><articleId><json:string>CNE21363</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>The torus longitudinalis (TL) is a tectum‐associated structure of actinopterygian fishes. The organization of the TL of rainbow trout was studied with Nissl staining, Golgi methods, immunocytochemistry with antibodies to γ‐aminobutyric acid (GABA), glutamic acid decarboxylase (GAD), and the GABAA receptor subunits δ and β2/β3, and with tract tracing methods. Two types of neuron were characterized: medium‐sized GABAergic neurons and small GABA‐negative granule cells. GABAA receptor subunit δ‐like immunoreactivity delineated two different TL regions, ventrolateral and central. Small GABAergic cells were also observed in marginal and periventricular strata of the optic tectum. These results indicate the presence of local GABAergic inhibitory circuits in the TL system. For tract‐tracing, a lipophilic dye (DiI) was applied to the TL and to presumed toropetal nuclei or toral targets. Toropetal neurons were observed in the optic tectum, in pretectal (central, intermediate, and paracommissural) nuclei, in the subvalvular nucleus, and associated with the pretectocerebellar tract. Torofugal fibers were numerous in the stratum marginale of the optic tectum. Toropetal pretectal nuclei also project to the cerebellum, and a few TL cells project to the cerebellar corpus. The pyramidal cells of the trout tectum were also studied by Golgi methods and local DiI labeling. The connections of trout TL revealed here were more similar to those recently reported in carp and holocentrids (Ito et al. [2003] J. Comp. Neurol. 457:202–211; Xue et al. [2003] J. Comp. Neurol. 462:194–212), than to those reported in earlier studies. However, important differences in organization of toropetal nuclei were noted between salmonids and these other teleosts. J. Comp. 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The organization of the TL of rainbow trout was studied with Nissl staining, Golgi methods, immunocytochemistry with antibodies to γ‐aminobutyric acid (GABA), glutamic acid decarboxylase (GAD), and the GABAA receptor subunits δ and β2/β3, and with tract tracing methods. Two types of neuron were characterized: medium‐sized GABAergic neurons and small GABA‐negative granule cells. GABAA receptor subunit δ‐like immunoreactivity delineated two different TL regions, ventrolateral and central. Small GABAergic cells were also observed in marginal and periventricular strata of the optic tectum. These results indicate the presence of local GABAergic inhibitory circuits in the TL system. For tract‐tracing, a lipophilic dye (DiI) was applied to the TL and to presumed toropetal nuclei or toral targets. Toropetal neurons were observed in the optic tectum, in pretectal (central, intermediate, and paracommissural) nuclei, in the subvalvular nucleus, and associated with the pretectocerebellar tract. Torofugal fibers were numerous in the stratum marginale of the optic tectum. Toropetal pretectal nuclei also project to the cerebellum, and a few TL cells project to the cerebellar corpus. The pyramidal cells of the trout tectum were also studied by Golgi methods and local DiI labeling. The connections of trout TL revealed here were more similar to those recently reported in carp and holocentrids (Ito et al. [2003] J. Comp. Neurol. 457:202–211; Xue et al. [2003] J. Comp. Neurol. 462:194–212), than to those reported in earlier studies. However, important differences in organization of toropetal nuclei were noted between salmonids and these other teleosts. J. Comp. Neurol. 503:348–370, 2007. © 2007 Wiley‐Liss, Inc.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>torus longitudinalis</term></item><item><term>GABA</term></item><item><term>GABAA receptors</term></item><item><term>pretectum</term></item><item><term>optic tectum</term></item><item><term>connections</term></item><item><term>teleosts</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Article</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2006-09-27">Received</change><change when="2007-02-13">Registration</change><change when="2007-07-10">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/64718A97B48636BBA402A06632D7E5332ADBD167/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Wiley Subscription Services, Inc., A Wiley Company</publisherName><publisherLoc>Hoboken</publisherLoc></publisherInfo><doi registered="yes">10.1002/(ISSN)1096-9861</doi><issn type="print">0021-9967</issn><issn type="electronic">1096-9861</issn><idGroup><id type="product" value="CNE"></id></idGroup><titleGroup><title type="main" xml:lang="en">Journal of Comparative Neurology</title><title type="short">J. 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Neurol.</title></titleGroup></publicationMeta><publicationMeta level="part" position="20"><doi origin="wiley" registered="yes">10.1002/cne.v503:2</doi><numberingGroup><numbering type="journalVolume" number="503">503</numbering><numbering type="journalIssue">2</numbering></numberingGroup><coverDate startDate="2007-07-10">10 July 2007</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="110" status="forIssue"><doi origin="wiley" registered="yes">10.1002/cne.21363</doi><idGroup><id type="unit" value="CNE21363"></id></idGroup><countGroup><count type="pageTotal" number="23"></count></countGroup><titleGroup><title type="articleCategory">Article</title><title type="tocHeading1">Articles</title></titleGroup><copyright ownership="publisher">Copyright © 2007 Wiley‐Liss, Inc.</copyright><eventGroup><event type="manuscriptReceived" date="2006-09-27"></event><event type="manuscriptRevised" date="2006-12-21"></event><event type="manuscriptAccepted" date="2007-02-13"></event><event type="firstOnline" date="2007-05-09"></event><event type="publishedOnlineFinalForm" date="2007-05-09"></event><event type="xmlConverted" agent="Converter:JWSART34_TO_WML3G version:2.3.2 mode:FullText source:FullText result:FullText" date="2010-03-01"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-15"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-30"></event></eventGroup><numberingGroup><numbering type="pageFirst">348</numbering><numbering type="pageLast">370</numbering></numberingGroup><correspondenceTo>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:CNE.CNE21363.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="11"></count><count type="tableTotal" number="1"></count><count type="referenceTotal" number="104"></count><count type="wordTotal" number="16104"></count></countGroup><titleGroup><title type="main" xml:lang="en">Organization of the torus longitudinalis in the rainbow trout (<i>Oncorhynchus mykiss</i>): An immunohistochemical study of the GABAergic system and a DiI tract‐tracing study</title><title type="short" xml:lang="en">The Torus Longitudinalis of Trout</title></titleGroup><creators><creator xml:id="au1" creatorRole="author" affiliationRef="#af1" currentRef="#curr1"><personName><givenNames>Mónica</givenNames><familyName>Folgueira</familyName></personName></creator><creator xml:id="au2" creatorRole="author" affiliationRef="#af2"><personName><givenNames>Catalina</givenNames><familyName>Sueiro</familyName></personName></creator><creator xml:id="au3" creatorRole="author" affiliationRef="#af2"><personName><givenNames>Isabel</givenNames><familyName>Rodríguez‐Moldes</familyName></personName></creator><creator xml:id="au4" creatorRole="author" affiliationRef="#af1"><personName><givenNames>Julián</givenNames><familyName>Yáñez</familyName></personName></creator><creator xml:id="au5" creatorRole="author" affiliationRef="#af2" corresponding="yes"><personName><givenNames>Ramón</givenNames><familyName>Anadón</familyName></personName><contactDetails><email>bfanadon@usc.es</email></contactDetails></creator></creators><affiliationGroup><affiliation xml:id="af1" countryCode="ES" type="organization"><unparsedAffiliation>Department of Cell and Molecular Biology, University of A Coruña, 15007‐A Coruña, Spain</unparsedAffiliation></affiliation><affiliation xml:id="af2" countryCode="ES" type="organization"><unparsedAffiliation>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</unparsedAffiliation></affiliation><affiliation xml:id="curr1"><unparsedAffiliation>Department of Anatomy and Developmental Biology, University College London, London WC1E 6BT, UK</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en" type="author"><keyword xml:id="kwd1">torus longitudinalis</keyword><keyword xml:id="kwd2">GABA</keyword><keyword xml:id="kwd3">GABA<sub>A</sub> receptors</keyword><keyword xml:id="kwd4">pretectum</keyword><keyword xml:id="kwd5">optic tectum</keyword><keyword xml:id="kwd6">connections</keyword><keyword xml:id="kwd7">teleosts</keyword></keywordGroup><fundingInfo><fundingAgency>Spanish Ministerio de Educación y Ciencia</fundingAgency><fundingNumber>BFU2004‐03144</fundingNumber><fundingNumber>BFU2004‐03313</fundingNumber></fundingInfo><fundingInfo><fundingAgency>Diputación de A Coruña</fundingAgency></fundingInfo><abstractGroup><abstract type="main" xml:lang="fr"><title type="main">Abstract</title><p>The torus longitudinalis (TL) is a tectum‐associated structure of actinopterygian fishes. The organization of the TL of rainbow trout was studied with Nissl staining, Golgi methods, immunocytochemistry with antibodies to γ‐aminobutyric acid (GABA), glutamic acid decarboxylase (GAD), and the GABA<sub>A</sub> receptor subunits δ and β2/β3, and with tract tracing methods. Two types of neuron were characterized: medium‐sized GABAergic neurons and small GABA‐negative granule cells. GABA<sub>A</sub> receptor subunit δ‐like immunoreactivity delineated two different TL regions, ventrolateral and central. Small GABAergic cells were also observed in marginal and periventricular strata of the optic tectum. These results indicate the presence of local GABAergic inhibitory circuits in the TL system. For tract‐tracing, a lipophilic dye (DiI) was applied to the TL and to presumed toropetal nuclei or toral targets. Toropetal neurons were observed in the optic tectum, in pretectal (central, intermediate, and paracommissural) nuclei, in the subvalvular nucleus, and associated with the pretectocerebellar tract. Torofugal fibers were numerous in the stratum marginale of the optic tectum. Toropetal pretectal nuclei also project to the cerebellum, and a few TL cells project to the cerebellar corpus. The pyramidal cells of the trout tectum were also studied by Golgi methods and local DiI labeling. The connections of trout TL revealed here were more similar to those recently reported in carp and holocentrids (Ito et al. [<link href="#bib45">2003</link>] J. Comp. Neurol. 457:202–211; Xue et al. [<link href="#bib99">2003</link>] J. Comp. Neurol. 462:194–212), than to those reported in earlier studies. However, important differences in organization of toropetal nuclei were noted between salmonids and these other teleosts. J. Comp. Neurol. 503:348–370, 2007. © 2007 Wiley‐Liss, Inc.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Organization of the torus longitudinalis in the rainbow trout (Oncorhynchus mykiss): An immunohistochemical study of the GABAergic system and a DiI tract‐tracing study</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>The Torus Longitudinalis of Trout</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Organization of the torus longitudinalis in the rainbow trout (Oncorhynchus mykiss): An immunohistochemical study of the GABAergic system and a DiI tract‐tracing study</title></titleInfo><name type="personal"><namePart type="given">Mónica</namePart><namePart type="family">Folgueira</namePart><affiliation>Department of Cell and Molecular Biology, University of A Coruña, 15007‐A Coruña, Spain</affiliation><affiliation>Current Address: Department of Anatomy and Developmental Biology, University College London, London WC1E 6BT, UK</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Catalina</namePart><namePart type="family">Sueiro</namePart><affiliation>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Isabel</namePart><namePart type="family">Rodríguez‐Moldes</namePart><affiliation>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Julián</namePart><namePart type="family">Yáñez</namePart><affiliation>Department of Cell and Molecular Biology, University of A Coruña, 15007‐A Coruña, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Ramón</namePart><namePart type="family">Anadón</namePart><affiliation>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</affiliation><affiliation>Department of Cell Biology and Ecology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><place><placeTerm type="text">Hoboken</placeTerm></place><dateIssued encoding="w3cdtf">2007-07-10</dateIssued><dateCaptured encoding="w3cdtf">2006-09-27</dateCaptured><dateValid encoding="w3cdtf">2007-02-13</dateValid><copyrightDate encoding="w3cdtf">2007</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">11</extent><extent unit="tables">1</extent><extent unit="references">104</extent><extent unit="words">16104</extent></physicalDescription><abstract lang="fr">The torus longitudinalis (TL) is a tectum‐associated structure of actinopterygian fishes. The organization of the TL of rainbow trout was studied with Nissl staining, Golgi methods, immunocytochemistry with antibodies to γ‐aminobutyric acid (GABA), glutamic acid decarboxylase (GAD), and the GABAA receptor subunits δ and β2/β3, and with tract tracing methods. Two types of neuron were characterized: medium‐sized GABAergic neurons and small GABA‐negative granule cells. GABAA receptor subunit δ‐like immunoreactivity delineated two different TL regions, ventrolateral and central. Small GABAergic cells were also observed in marginal and periventricular strata of the optic tectum. These results indicate the presence of local GABAergic inhibitory circuits in the TL system. For tract‐tracing, a lipophilic dye (DiI) was applied to the TL and to presumed toropetal nuclei or toral targets. Toropetal neurons were observed in the optic tectum, in pretectal (central, intermediate, and paracommissural) nuclei, in the subvalvular nucleus, and associated with the pretectocerebellar tract. Torofugal fibers were numerous in the stratum marginale of the optic tectum. Toropetal pretectal nuclei also project to the cerebellum, and a few TL cells project to the cerebellar corpus. The pyramidal cells of the trout tectum were also studied by Golgi methods and local DiI labeling. The connections of trout TL revealed here were more similar to those recently reported in carp and holocentrids (Ito et al. [2003] J. Comp. Neurol. 457:202–211; Xue et al. [2003] J. Comp. Neurol. 462:194–212), than to those reported in earlier studies. However, important differences in organization of toropetal nuclei were noted between salmonids and these other teleosts. J. Comp. Neurol. 503:348–370, 2007. © 2007 Wiley‐Liss, Inc.</abstract><note type="funding">Spanish Ministerio de Educación y Ciencia - No. BFU2004‐03144; No. BFU2004‐03313; </note><note type="funding">Diputación de A Coruña</note><subject lang="en"><genre>keywords</genre><topic>torus longitudinalis</topic><topic>GABA</topic><topic>GABAA receptors</topic><topic>pretectum</topic><topic>optic tectum</topic><topic>connections</topic><topic>teleosts</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Comparative Neurology</title></titleInfo><titleInfo type="abbreviated"><title>J. Comp. Neurol.</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Article</topic></subject><identifier type="ISSN">0021-9967</identifier><identifier type="eISSN">1096-9861</identifier><identifier type="DOI">10.1002/(ISSN)1096-9861</identifier><identifier type="PublisherID">CNE</identifier><part><date>2007</date><detail type="volume"><caption>vol.</caption><number>503</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>348</start><end>370</end><total>23</total></extent></part></relatedItem><identifier type="istex">64718A97B48636BBA402A06632D7E5332ADBD167</identifier><identifier type="DOI">10.1002/cne.21363</identifier><identifier type="ArticleID">CNE21363</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2007 Wiley‐Liss, Inc.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Wiley Subscription Services, Inc., A Wiley Company</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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