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  • 1
    Electronic Resource
    Electronic Resource
    Evidence for the Existence of a Terminal Nerve in Lampreys and in Birds (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 519 (1987), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1987.tb36311.x
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  • 2
    Electronic Resource
    Electronic Resource
    Possible multiple evolution of indirect telencephalo-cerebellar pathways in teleosts: studies in Carassius auratus and Pantodon buchholzi (1993)
    Springer
    Cell & tissue research 274 (1993), S. 447-455 
    Details
    ISSN: 1432-0878
    Keywords: Cerebellum ; Evolution ; Brain, vertebrate ; Pons ; Telencephalon ; Carassius auratus, Pantodon buchholzi (Teleostei)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Among vertebrates, telencephalo-pontine systems exist only in birds and mammals. However, three nuclei in the diencephalon and mesencephalon of teleost fishes have been indicated — analogous to the pons — to represent relay stations between telencephalon and cerebellum. Since two of these nuclei (dorsal preglomerular nucleus, dorsal tegmental nucleus) have only been described in the highly derived, electrosensory mormyrids, we investigated telencephalic connections in two nonelectrosensory teleosts, the goldfish Carassius auratus and the freshwater butterflyfish Pantodon buchholzi, and cerebellar connections only in the latter species, since for C. auratus these connections are already established. Horseradish peroxidase tracing reveals that C. auratus has a dorsal tegmental nucleus and a paracommissural nucleus both of which are telencephalo-recipient and project to the cerebellum, and that P. buchholzi has a dorsal preglomerular nucleus with such connections. These results extend our knowlegde of the distribution and, therefore, the phylogeny of telencephalo-cerebellar systems in teleosts. Similar to tetrapods, teleosts appear to have developed telencephalo-cerebellar systems several times independently.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00314541
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  • 3
    Electronic Resource
    Electronic Resource
    Glial fibrillary acidic protein in the brain of the caecilian Typhlonectes natans (Amphibia, Gymnophiona): an immunocytochemical study (1995)
    Springer
    Cell & tissue research 283 (1995), S. 51-58 
    Details
    ISSN: 1432-0878
    Keywords: Key words: Glial fibrillary acidic protein ; Radial glial cells ; Perivascular endfeet ; Glial framework ; Typhlonectes natans (Gymnophiona)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. The astroglia of adult and juvenile (metamorphosed) Typhlonectes natans (Fischer) was investigated immunocytochemically with a monoclonal antibody directed against glial fibrillary acidic protein (GFAP). The astroglia of this member of the Order Gymnophiona of the class Amphibia is mainly composed of radial glial cells. Their somata limit the ventricles. They each give rise to a thick process that extends through the periventricular gray and arborizes within the neuropil. At the subpial surface, endfeet establish the membrana gliae limitans externa. Some extraependymal radial glial cells are immunoreactive, but no mammalian-like astrocytes are visualized. In the spinal cord, perikarya of radial glia are displaced from the GFAP-immunonegative ependyma. Perivascular endfeet and processes lining blood vessels are abundantly labeled. An increase in GFAP immunoreactivity extends from the exclusive labeling of subpial endfeet in newborn, recently metamorphosed animals, to the subsequent staining of distal processes and of the entire cell in older juveniles. The midline glia of the brainstem is immunoreactive at all ages examined. Strong glial wedges separate and delineate fiber tracts. Radial glial fibers in the habenulae are particularly thick and exhibit strong GFAP immunoreactivity, even in juveniles where GFAP immunoreactivity is otherwise minimal. The pattern of GFAP immunolabeling in the caecilian T. natans is similar to that in salamanders, but not to that in frogs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00008806
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  • 4
    Electronic Resource
    Electronic Resource
    Retino-fugal projections in congenitally monophthalmic fish and anurans (1991)
    Springer
    Cell & tissue research 265 (1991), S. 459-464 
    Details
    ISSN: 1432-0878
    Keywords: Visual system ; Optic chiasm ; Ontogeny ; Ictahurus nebulosus (Teleostei) ; Xenopus laevis (Anura)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Intra-ocular deposition of horseradish peroxidase was used to visualize optic tract projections in normal and congenitally monophthalmic catfish and Xenopus. In neither species was evidence for an increased ipsilateral visual component found in congenitally one-eyed specimens. This indicates that competition between axons from both eyes is not an important mechanism for fiber distribution in the chiasm during ontogeny. Furthermore, it suggests that enhanced ipsilateral components, previously noted in unilaterally enucleated fish and anurans, are caused by debris of degenerated axons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00340868
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  • 5
    Electronic Resource
    Electronic Resource
    Connections of the olfactory bulb in the piranha (Serrasalmus nattereri) (1981)
    Springer
    Cell & tissue research 216 (1981), S. 167-180 
    Details
    ISSN: 1432-0878
    Keywords: Olfactory system ; Teleost ; Tracer (HRP)-study ; Parcellation theory ; Telencephalon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The connections of the olfactory bulb were studied in the piranha using the Nauta and horseradish-peroxidase methods. Three olfactory tracts project to seven terminal fields in the telencephalon and one in the diencephalon, all of them bilaterally. The contralateral olfactory bulb also receives a small input. All contralateral projections decussate in the anterior commissure and are relatively weak compared to the ipsilateral projections. HRP-containing cells were found in all of the ipsilateral telencephalic aggregates receiving an olfactory tract projection; the contralateral side was free of labeled cell bodies. Although only about one fourth of the entire telencephalon receives a direct olfactory input, the high degree of differentiation of the olfactory system suggests that the piranha depends substantially on the sense of olfaction and that this species may be a good model for further studies on olfactory mechanisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00234552
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  • 6
    Electronic Resource
    Electronic Resource
    The valvula cerebelli of the spiny eel, Macrognathus aculeatus, receives primary lateral-line afferents from the rostrum of the upper jaw (1991)
    Springer
    Cell & tissue research 266 (1991), S. 285-293 
    Details
    ISSN: 1432-0878
    Keywords: Cerebellum ; Valvula ; Lateral-line system ; Mechanoreception ; Macrognathus aculeatus (Teleostei)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the spiny eel, Macrognathus aculeatus, anterodorsal and (to a lesser degree) anteroventral lateralline nerves project massively to the granular layer of the valvula cerebelli, throughout its rostrocaudal extent. The posterior lateral-line nerve terminates in the corpus cerebelli. Thus, valvula and corpus cerebelli are supplied with mechanosensory input of different peripheral origins. An analysis of the taxonomic distribution of experimentally determined primary lateral-line input to the three parts of the teleostean cerebellum reveals that the eminentia granularis always receives such input, and that the corpus cerebelli is the recipient of primary lateral-line input in many teleosts. The valvula, however, receives primary lateral-line afferents in only two examined species. In M. aculeatus, the massive lateral-line input to the valvula probably originates in mechanoreceptors located in the elongated rostrum of the upper jaw, a characteristic feature of mastacembeloid fishes. This projection to the valvula may therefore represent a unique specialization that arose with the evolution of the peculiar rostrum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00318184
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  • 7
    Electronic Resource
    Electronic Resource
    Sexually dimorphic distribution of galanin in the preoptic area of red salmon, Oncorhynchus nerka (2000)
    Springer
    Cell & tissue research 302 (2000), S. 199-203 
    Details
    ISSN: 1432-0878
    Keywords: Galanin Peptides Preoptic area Hypothalamus Dimorphism Red salmon, Oncorhynchus nerka (Teleostei)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. A sexually dimorphic distribution of galanin in the preoptic region of the molly and goldfish has previously been demonstrated. Females of these species lack galanin-immunoreactive perikarya in the preoptic nucleus. In contrast, we have found, in female red salmon, galanin-immunoreactive neurons in the magnocellular preoptic nucleus, located far lateral to the preoptic recess, whereas many immunoreactive fibers are present in the preoptic area in both genders. In addition, many immunoreactive neurons have been seen in the nucleus preopticus periventricularis and nucleus lateralis tuberis, also in both sexes. These findings support the notion that galanin may play a gender-specific role in red salmon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004410000278
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  • 8
    Electronic Resource
    Electronic Resource
    Retinofugal and retinopetal projections in the teleost Channa micropeltes (Channiformes) (1988)
    Springer
    Cell & tissue research 251 (1988), S. 651-663 
    Details
    ISSN: 1432-0878
    Keywords: Visual system ; Retinal projections ; Pretectal area ; Optic tract ; HRP/cobalt technique ; Retinopetal neurons ; Channa micropeltes (Teleostei)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Retinofugal and retinopetal projections were investigated in the teleost fish Channa micropeltes (Channiformes) by means of the cobaltous lysine and horseradish peroxidase (HRP) tracing techniques. Retinofugal fibers cross completely in the optic chiasma. A conspicious lamination is present in those parts of the optic tract that give rise to the marginal branches of the optic tract. This layering of optic fibers continues in the marginal branches to mesencephalic levels. Retinal projections to the preoptic and hypothalamic regions are sparse; they are more pronounced in the area of pretectal nuclei. The medial pretectal complex and the cortical pretectal nucleus are more fully differentiated than in other teleostean species. Further targets include the thalamus and the optic tectum. The course of major optic sub-tracts and smaller fascicles is described. Retinopetal neurons are located contralaterally in a rostral and a caudal part of the nucleus olfactoretinalis, and in a circumscribed nucleus thalamoretinalis. The present findings are compared with reports on other teleost species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00214014
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  • 9
    Electronic Resource
    Electronic Resource
    Comparative analysis of FMRFamide-like immunoreactivity in caiman (Caiman crocodilus) and turtle (Trachemys scripta elegans) brains (1999)
    Springer
    Cell & tissue research 298 (1999), S. 549-559 
    Details
    ISSN: 1432-0878
    Keywords: Reptiles Brain Evolution FMRFamide Immunohistochemistry Caiman, Caiman crocodilus (Crocodiliä) Red-eared turtle, Trachemys scripta elegans (Chelonia)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. The distribution of FMRFamide (FMRFa)-like peptides in caiman (Caiman crocodilus) and turtle (Trachemys scripta elegans) brains was studied by immunohistochemistry. In both species, distinct groups of FMRFa-like immunoreactive (ir) perikarya were present in the medial septal nucleus, accumbens nucleus, nucleus of the diagonal band of Broca, suprachiasmatic area, lateral hypothalamic area, and periventricular hypothalamic nucleus. A few FMRFa-ir neurons in the hypothalamic area were located in the neuroepithelial cell lining of the third ventricle. FMRFa-ir fibers were scattered in all major areas of the brain, from the olfactory bulbs to the rhombencephalon. They formed dense aggregates in the medial septal area, basal telencephalon, median eminence, and infundibulum, and adjacent to the fourth ventricle. The most obvious difference between the FMRFa-ir systems in caimans and turtles concerned the number of nuclei that contained neurons with this immunoreactivity. Eight such clusters were present in the caiman brain, whereas thirteen clusters were found in the turtle brain. The turtle also displayed scattered FMRFa-ir somata in the anterior olfactory nucleus, striatum, lateral septal nucleus, medial and lateral cortex, medial forebrain bundle, lateral preoptic area, and lateral geniculate nucleus. In the caiman brain, a few FMRFa-ir neurons were noted in the ventrolateral area of the pallial commissure and an even smaller number of ir neurons was found dispersed in the optic tracts. Neither formed nuclear aggregates. The results are compared with those described for other vertebrates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004419900112
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  • 10
    Electronic Resource
    Electronic Resource
    Tectum opticum und Orientierungsreaktion (1974)
    Weinheim : Wiley-Blackwell
    Biologie in unserer Zeit 4 (1974), S. 106-112 
    Details
    ISSN: 0045-205X
    Keywords: Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/biuz.19740040403
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