Immunohistochemical Organization of the Forebrain in the White Sturgeon, &lt;i&gt;Acipenser transmontanus&lt;/i&gt;

Piñuela, Carmen; Northcutt, R. Glenn

doi:10.1159/000099612

Cited by 29 publications

(19 citation statements)

References 150 publications

(123 reference statements)

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“…Nucleus Vd contains a number of striatal markers [Piñuela and Northcutt, 2007], as it does in other ray-finned fishes. The most lateral part of Nieuwenhuys' Vd was termed Vl by Northcutt and Braford, who noted its heavy secondary olfactory input.…”

Section: Subpalliummentioning

confidence: 94%

“…The most salient features reported include: 1) Dm displays a higher number of somata and fibers positive for tyrosine hydroxylase than the rest of the pallium; and 2) the ventral portion of the postcommissural portion of Dp has the highest concentration of fibers positive for substance P in the pallium [Adrio et al, 2002;Piñuela and Northcutt, 2007]. Thus the zone recognized as Dp and in receipt of olfactory projections (see below) displays two different patterns of substance P distribution: precommissural portion, relatively sparse; postcommissural portion, relatively dense.…”

Section: Palliummentioning

confidence: 99%

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Stalking the Everted Telencephalon: Comparisons of Forebrain Organization in Basal Ray-Finned Fishes and Teleosts

Braford¹

2009

Brain Behav Evol

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Compared to land vertebrates and the other fishes, the basal ray-finned fishes and teleosts have morphologically unusual forebrains. The telencephalic pallium is everted, and its diencephalic inputs arise largely – not from what is clearly the dorsal thalamus but rather – from an enigmatic group of migrated nuclei of the basal diencephalon. The subpallia exhibit much less variation than the pallia. The polypteriforms have a long, thin pallial sheet that can be divided into four zones which recent data suggest could correspond to the ventral, lateral, dorsal, and medial pallia of tetrapods, with some caveats. In sturgeons and gars, the pallium is thicker and divisible into three or four zones. The data available for sturgeons and gars are not sufficient for the formulation of more than a barely working hypothesis, although a review of the existing literature has illuminated some basic unresolved issues in these taxa. The voluminous literature on the pallium of teleosts is briefly summarized. The thickened pallium is divided into four zones which are compared with those of the polypteriforms and those of the tetrapods. The topographical position of the primary olfactory target in the pallium is lateral, which is unexpected in an everted pallium. Several recent hypotheses have sought to explain this organization: partial eversion, caudolateral eversion and displacement, simple eversion with changed olfactory connections, and not quite so simple an eversion with preserved topology. These hypotheses are evaluated and some persisting problems are enumerated.

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Section: Subpalliummentioning

confidence: 94%

Section: Palliummentioning

confidence: 99%

Stalking the Everted Telencephalon: Comparisons of Forebrain Organization in Basal Ray-Finned Fishes and Teleosts

Braford¹

2009

Brain Behav Evol

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“…THir, CB-ir, and CR-ir immunoreactive cells were also reported in the granule cell layer of sturgeons (Piñuela and Northcutt, 2007;Adrio et al, 2002;Graña et al, 2012). Olfactory bulb connections were studied in Polypterus by Nauta and Fink-Heimer techniques (Braford and Northcutt, 1974) and also with neuronal tracers (Holmes and Northcutt, 2003) showing mitral cells located within the external cellular layer that project mainly to the ipsilateral dorsal subdivision of P1 (P1d).…”

Section: Distribution Of Cabps In the Bichir Telencephalon Olfactory mentioning

confidence: 97%

Immunohistochemical distribution of calretinin and calbindin (D‐28k) in the brain of the cladistian Polypterus senegalus

Graña¹,

Folgueira²,

Huesa³

et al. 2013

J of Comparative Neurology

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Polypteriform fishes are believed to be basal to other living ray-finned bony fishes, and they may be useful for providing information of the neural organization that existed in the brain of the earliest ray-finned fishes. The calcium-binding proteins calretinin (CR) and calbindin-D28k (CB) have been widely used to characterize neuronal populations in vertebrate brains. Here, the distribution of the immunoreactivity against CR and CB was investigated in the olfactory organ and brain of Polypterus senegalus and compared to the distribution of these molecules in other ray-finned fishes. In general, CB-immunoreactive (ir) neurons were less abundant than CR-ir cells. CR immunohistochemistry revealed segregation of CR-ir olfactory receptor neurons in the olfactory mucosa and their bulbar projections. Our results confirmed important differences between pallial regions in terms of CR immunoreactivity of cell populations and afferent fibers. In the habenula, these calcium-binding proteins revealed right-left asymmetry of habenular subpopulations and segregation of their interpeduncular projections. CR immunohistochemistry distinguished among some thalamic, pretectal, and posterior tubercle-derived populations. Abundant CR-ir populations were observed in the midbrain, including the tectum. CR immunoreactivity was also useful for characterizing a putative secondary gustatory/visceral nucleus in the isthmus, and for distinguishing territories in the primary viscerosensory column and octavolateral region. Comparison of the data obtained within a segmental neuromeric context indicates that some CB-ir and CR-ir populations in polypteriform fishes are shared with other ray-finned fishes, but other positive structures appear to have evolved following the separation between polypterids and other ray-finned fishes.

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“…In the hypothesis of an extended Dm (B), most of Dp lies beneath Dm and DdþDl, and its border is marked by the dotted line. The relative positions of the pallial divisions in the hypothesis of a restricted Dm are based on a reconstruction by Piñuela and Northcutt (2007), whereas the positions of the pallial divisions for the extended hypothesis are based on a reconstruction using the transverse sections of the telencephalon published by Huesa et al (2006). For abbreviations, see list.…”

Section: Fiber Tracingmentioning

confidence: 99%

Olfactory projections in the white sturgeon, Acipenser transmontanus: An experimental study

Northcutt

2011

J of Comparative Neurology

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Telencephalic evolution in ray-finned fishes shows increasing complexity from polypteriform fishes through sturgeons to teleosts. Telencephalic organization in sturgeons is thus critical to our understanding of ray-finned fish evolution, but it is poorly understood, particularly as regards the roof or pallium. Two major hypotheses exist regarding the medial part of area dorsalis (Dm): that Dm is extended; and that Dm is restricted. The extent and topography of secondary olfactory projections to the pallium are critical in evaluating these hypotheses, but there is little agreement regarding these projections. Olfactory projections in the white sturgeon were therefore examined by using the carbocyanine probe DiI, biocytin, and biotinylated dextrin amine (BDA). Both DiI and BDA revealed primary olfactory projections to the olfactory bulb and primary extrabulbar projections widely in the telencephalon and to more restricted regions of the diencephalon. Myelinated secondary olfactory fibers caused DiI to be less effective in labeling secondary olfactory projections, which terminate in all subpallial nuclei and in the pallium: sparsely in the medial pallial division (Dm); heavily in the posterior pallial division (Dp); and more lightly in the lateral pallial division (Dl). In the diencephalon, substantial secondary olfactory projections were seen to the habenular nuclei, the rostral pole of the inferior lobe, and several nuclei of the posterior tubercle. All secondary olfactory projections were bilateral but heavier ipsilaterally. Bulbopetal neurons were located in both pallial and subpallial centers and were more numerous ipsilaterally. These results corroborate an earlier experimental study on the shovelnose sturgeon and indicate a restricted Dm in sturgeons.

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Immunohistochemical Organization of the Forebrain in the White Sturgeon, <i>Acipenser transmontanus</i>

Cited by 29 publications

References 150 publications

Stalking the Everted Telencephalon: Comparisons of Forebrain Organization in Basal Ray-Finned Fishes and Teleosts

Stalking the Everted Telencephalon: Comparisons of Forebrain Organization in Basal Ray-Finned Fishes and Teleosts

Immunohistochemical distribution of calretinin and calbindin (D‐28k) in the brain of the cladistian Polypterus senegalus

Olfactory projections in the white sturgeon, Acipenser transmontanus: An experimental study

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