Neural connections of the pineal organ in the primitive bony fish Acipenser baeri: A carbocyanine dye tract‐tracing study
Identifieur interne : 001318 ( Istex/Corpus ); précédent : 001317; suivant : 001319Neural connections of the pineal organ in the primitive bony fish Acipenser baeri: A carbocyanine dye tract‐tracing study
Auteurs : Julián Yá Ez ; Ram N Anad NSource :
- Journal of Comparative Neurology [ 0021-9967 ] ; 1998-08-24.
English descriptors
- KwdEn :
Abstract
The pineal organ of the sturgeon (Acipenser baeri; Chondrostei) consists of an elongated terminal vesicle and a long stalk that runs to the region of the posterior commissure. In order to investigate the neural connections of the pineal organ of the sturgeon, a fluorescent indocarbocyanine (DiI) was applied to the pineal stalk of paraformaldehyde‐fixed brains. This application strongly labeled the pineal tracts (right and left), which form an extensive bilateral projection to the brain. The fibers of these tracts could be followed to their different targets in the brain, namely the preoptic region, the rostral habenulae, the medial subhabenular and retrohabenular (post‐ and subcommissural) region, the medial thalamus, the dorsal hypothalamus, the pretectal area, and medial and dorsolateral tegmental mesencephalic regions (interstitial nucleus of Cajal, oculomotor nucleus, mesencephalic reticular area, nucleus profundus mesencephali, and central gray). A few fibers reach the interpeduncular nucleus and the rostral optic tectum. Pinealofugal fibers branched profusely, and some of them crossed the midline ventrally in the optic chiasma, the postoptic commissure, the conspicuous preinfundibular commissure or, occasionally, the mesencephalic tegmentum. In addition to pinealofugal fibers, this type of DiI application labeled a few cells, here interpreted as pinealopetal neurons, in the posthabenular‐dorsomedial thalamic region and the central gray of the mesencephalon. The wide distribution of pinealofugal projections in sturgeon is reminiscent of that in the lamprey. Comparison of the present findings with those of other authors in teleosts, amphibians, and reptiles also suggests that there has been a reduction in the number of pineal projections in these lines. J. Comp. Neurol. 398:151–161, 1998. © 1998 Wiley‐Liss, Inc.
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DOI: 10.1002/(SICI)1096-9861(19980824)398:2<151::AID-CNE1>3.0.CO;2-#
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In order to investigate the neural connections of the pineal organ of the sturgeon, a fluorescent indocarbocyanine (DiI) was applied to the pineal stalk of paraformaldehyde‐fixed brains. This application strongly labeled the pineal tracts (right and left), which form an extensive bilateral projection to the brain. The fibers of these tracts could be followed to their different targets in the brain, namely the preoptic region, the rostral habenulae, the medial subhabenular and retrohabenular (post‐ and subcommissural) region, the medial thalamus, the dorsal hypothalamus, the pretectal area, and medial and dorsolateral tegmental mesencephalic regions (interstitial nucleus of Cajal, oculomotor nucleus, mesencephalic reticular area, nucleus profundus mesencephali, and central gray). A few fibers reach the interpeduncular nucleus and the rostral optic tectum. Pinealofugal fibers branched profusely, and some of them crossed the midline ventrally in the optic chiasma, the postoptic commissure, the conspicuous preinfundibular commissure or, occasionally, the mesencephalic tegmentum. In addition to pinealofugal fibers, this type of DiI application labeled a few cells, here interpreted as pinealopetal neurons, in the posthabenular‐dorsomedial thalamic region and the central gray of the mesencephalon. The wide distribution of pinealofugal projections in sturgeon is reminiscent of that in the lamprey. Comparison of the present findings with those of other authors in teleosts, amphibians, and reptiles also suggests that there has been a reduction in the number of pineal projections in these lines. J. Comp. 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In order to investigate the neural connections of the pineal organ of the sturgeon, a fluorescent indocarbocyanine (DiI) was applied to the pineal stalk of paraformaldehyde‐fixed brains. This application strongly labeled the pineal tracts (right and left), which form an extensive bilateral projection to the brain. The fibers of these tracts could be followed to their different targets in the brain, namely the preoptic region, the rostral habenulae, the medial subhabenular and retrohabenular (post‐ and subcommissural) region, the medial thalamus, the dorsal hypothalamus, the pretectal area, and medial and dorsolateral tegmental mesencephalic regions (interstitial nucleus of Cajal, oculomotor nucleus, mesencephalic reticular area, nucleus profundus mesencephali, and central gray). A few fibers reach the interpeduncular nucleus and the rostral optic tectum. Pinealofugal fibers branched profusely, and some of them crossed the midline ventrally in the optic chiasma, the postoptic commissure, the conspicuous preinfundibular commissure or, occasionally, the mesencephalic tegmentum. In addition to pinealofugal fibers, this type of DiI application labeled a few cells, here interpreted as pinealopetal neurons, in the posthabenular‐dorsomedial thalamic region and the central gray of the mesencephalon. The wide distribution of pinealofugal projections in sturgeon is reminiscent of that in the lamprey. Comparison of the present findings with those of other authors in teleosts, amphibians, and reptiles also suggests that there has been a reduction in the number of pineal projections in these lines. J. Comp. 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In order to investigate the neural connections of the pineal organ of the sturgeon, a fluorescent indocarbocyanine (DiI) was applied to the pineal stalk of paraformaldehyde‐fixed brains. This application strongly labeled the pineal tracts (right and left), which form an extensive bilateral projection to the brain. The fibers of these tracts could be followed to their different targets in the brain, namely the preoptic region, the rostral habenulae, the medial subhabenular and retrohabenular (post‐ and subcommissural) region, the medial thalamus, the dorsal hypothalamus, the pretectal area, and medial and dorsolateral tegmental mesencephalic regions (interstitial nucleus of Cajal, oculomotor nucleus, mesencephalic reticular area, nucleus profundus mesencephali, and central gray). A few fibers reach the interpeduncular nucleus and the rostral optic tectum. Pinealofugal fibers branched profusely, and some of them crossed the midline ventrally in the optic chiasma, the postoptic commissure, the conspicuous preinfundibular commissure or, occasionally, the mesencephalic tegmentum. In addition to pinealofugal fibers, this type of DiI application labeled a few cells, here interpreted as pinealopetal neurons, in the posthabenular‐dorsomedial thalamic region and the central gray of the mesencephalon. The wide distribution of pinealofugal projections in sturgeon is reminiscent of that in the lamprey. Comparison of the present findings with those of other authors in teleosts, amphibians, and reptiles also suggests that there has been a reduction in the number of pineal projections in these lines. J. Comp. Neurol. 398:151–161, 1998. © 1998 Wiley‐Liss, Inc.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Neural connections of the pineal organ in the primitive bony fish Acipenser baeri: A carbocyanine dye tract‐tracing study</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Neural connections of the pineal organ in the primitive bony fish Acipenser baeri: A carbocyanine dye tract‐tracing study</title></titleInfo><name type="personal"><namePart type="given">Julián</namePart><namePart type="family">Yáñez</namePart><affiliation>Departamento de Biología Celular y Molecular, Facultad de Ciencias, Universidad de La Coruñ, 15071 La 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>Departamento de Biología Fundamental, Facultad de Biología, Universidad de Santiago de Compostela, 15706 Santiago de Compostela, Spain</affiliation><affiliation>Departamento de Biología Fundamental, Facultad de Biología, Universidad de 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>John Wiley & Sons, Inc.</publisher><place><placeTerm type="text">New York</placeTerm></place><dateIssued encoding="w3cdtf">1998-08-24</dateIssued><dateCaptured encoding="w3cdtf">1997-12-03</dateCaptured><dateValid encoding="w3cdtf">1998-04-12</dateValid><copyrightDate encoding="w3cdtf">1998</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">5</extent><extent unit="references">38</extent><extent unit="words">6051</extent></physicalDescription><abstract lang="en">The pineal organ of the sturgeon (Acipenser baeri; Chondrostei) consists of an elongated terminal vesicle and a long stalk that runs to the region of the posterior commissure. In order to investigate the neural connections of the pineal organ of the sturgeon, a fluorescent indocarbocyanine (DiI) was applied to the pineal stalk of paraformaldehyde‐fixed brains. This application strongly labeled the pineal tracts (right and left), which form an extensive bilateral projection to the brain. The fibers of these tracts could be followed to their different targets in the brain, namely the preoptic region, the rostral habenulae, the medial subhabenular and retrohabenular (post‐ and subcommissural) region, the medial thalamus, the dorsal hypothalamus, the pretectal area, and medial and dorsolateral tegmental mesencephalic regions (interstitial nucleus of Cajal, oculomotor nucleus, mesencephalic reticular area, nucleus profundus mesencephali, and central gray). A few fibers reach the interpeduncular nucleus and the rostral optic tectum. Pinealofugal fibers branched profusely, and some of them crossed the midline ventrally in the optic chiasma, the postoptic commissure, the conspicuous preinfundibular commissure or, occasionally, the mesencephalic tegmentum. In addition to pinealofugal fibers, this type of DiI application labeled a few cells, here interpreted as pinealopetal neurons, in the posthabenular‐dorsomedial thalamic region and the central gray of the mesencephalon. The wide distribution of pinealofugal projections in sturgeon is reminiscent of that in the lamprey. Comparison of the present findings with those of other authors in teleosts, amphibians, and reptiles also suggests that there has been a reduction in the number of pineal projections in these lines. J. Comp. Neurol. 398:151–161, 1998. © 1998 Wiley‐Liss, Inc.</abstract><note type="funding">Spanish Education Ministry - No. PB96‐0945‐C02; </note><note type="funding">Xunta de Galicia - No. XUGA20002B97; </note><subject lang="en"><genre>keywords</genre><topic>pineal connections</topic><topic>afferents</topic><topic>pinealopetal neurons</topic><topic>bony fishes</topic><topic>Acipenser baeri (Chondrostei)</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><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>1998</date><detail type="volume"><caption>vol.</caption><number>398</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>151</start><end>161</end><total>11</total></extent></part></relatedItem><identifier type="istex">213A8E4EDB66B6E1357109EF2CD45585225ED9F3</identifier><identifier type="DOI">10.1002/(SICI)1096-9861(19980824)398:2<151::AID-CNE1>3.0.CO;2-#</identifier><identifier type="ArticleID">CNE1</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 1998 Wiley‐Liss, Inc.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>John Wiley & Sons, Inc.</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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