The central nervous system of Protopterus annectens

Burckhardt, K.

doi:10.1002/cne.910020110

Cited by 15 publications

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“…Information on the telencephalon in lungfish would also aid in determining whether the telencephalon in living amphibians is representative of that found in ancestral land vertebrates, or whether the telencephalon in living amphibians is regressive in relation to that of ancestral land vertebrates. Few published studies are available, however, on the major cell groups and organization of the telencephalon in lungfish, and these studies are largely descriptive in nature (Burckhardt, 1892;Bing and Burckhardt, '04;Elliot-Smith, '08;Holmgren and van der Horst, '25;Rudebeck, '44, '45;Schnitzlein and Crosby, '67;Nieuwenhuys, '69). Further, in these studies, the major cell groups were defined only by their cytoarchitecture and, consequently, identification of their homolgues in land vertebrates has been largely conjectural.…”

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confidence: 99%

An immunohistochemical study of the telencephalon of the african lungfish, Protopterus annectens

Reiner

Northcutt

1987

J of Comparative Neurology

145

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The telencephalon of the African lungfish, Protopterus annectens, was studied by immunohistochemical techniques in order to identify the major subdivisions of the telencephalon and determine the possible homologues of these subdivisions, if any, in other vertebrates. The distributions of four different neuropeptides (substance P, leucine-enkephalin, avian pancreatic polypeptide, and LANT6), a neurotransmitter (serotonin), and a neurotransmitter-related enzyme that is involved in catecholamine synthesis (tyrosine hydroxylase) were examined. The resultant labeling patterns indicated that the telencephalon of lungfish consists of three major subdivisions--a rostrally and dorsally situated olfactory bulb, a dorsally situated pallial region located caudal to the olfactory bulbs, and a ventrally situated subpallial regions. The dorsal and lateral pallial regions, which both receive secondary olfactory input, are somewhat distinct from one another cytoarchitectonically, but their immunohistochemical labeling characteristics did not differ. Thus, the lateral pallium and the dorsal pallium together appear to constitute an olfactory pallium in lungfishes. The medial pallium was found to consist of three immunohistochemically distinct subdivisions--a dorsal cell group, an intermediate cell group, and a ventral cell group. These medial pallial fields extend throughout the entire rostrocaudal extent of the medial wall of the telencephalon. Although one or more of these medial pallial cell groups may be homologous to specific portions of the medial pallium in land vertebrates, no specific similarities were observed to support any proposed one-to-one correspondences. The possibility that one or more of the medial pallial cell groups of lungfishes correspond to cell groups located in the dorsal pallium of land vertebrates could not be excluded. The subpallium is divided into lateral, medial, and caudal subdivisions. The lateral subdivision appears to be homologous to the basal ganglia of land vertebrates since it contains neuropeptide/neurotransmitter-specific neuronal populations that are characteristic of the striatal and pallidal portions of the basal ganglia of amniotes. The medial subdivision of the subpallium shows the topographic and immunohistochemical characteristics of the septal region and the nucleus accumbens region of the amniote telencephalon. The caudal subpallium does not show any distinctive immunohistochemical labeling characteristics and its possible homologue in land vertebrates is unclear.(ABSTRACT TRUNCATED AT 400 WORDS)

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confidence: 99%

An immunohistochemical study of the telencephalon of the african lungfish, Protopterus annectens

Reiner

Northcutt

1987

J of Comparative Neurology

145

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“…Direct comparisons between the raphe nuclei in mammals and neural structures in the lungfish CNS are difficult because of the inability to differentiate between homoplasous and homologous structures (Northcutt, '84). In fact, even the nomenclature of the lungfish CNS has remained controversial for almost a century (Burckhardt, 1892; Rudebeck, '44, '45; Schnitzlein and Crosby, '67; Clairambault and Capanna, '73; Thors and Nieuwenhuys,'79;Ronan and Northcutt,'85;Reiner and Northcutt,'87). Application of modern neuroanatomical methods such as retrograde tracing with HRP (Ronan and Northcutt, '85) and immunohistochemistry (Reiner and Northcutt,'87) has begun to resolve many of these comparative neuroanatomic issues.…”

Section: Discussionmentioning

confidence: 99%

“…After generation of autoradiographs, all slides were stained with cresyl violet and Luxol blue (Kluver-Barrera stain) to facilitate identification of nuclei and subregions of the lungfish CNS. Neuroanatomical structures were identified by using various papers delineating the nuclei and subregions of the lungfish telencephalon, diencephalon, midbrain, and spinal cord (Burckhardt, 1892;Thors and Nieuwenhuys, '79;Ronan and Northcutt, '85;Reiner and Northcutt, '87).…”

Section: Quantitative Autoradiographymentioning

confidence: 99%

Autoradiographic distribution of thyrotropin‐releasing hormone receptors in the african lungfish Protopterus annectens

Pack

Caine

Winokur

et al. 1989

J of Comparative Neurology

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We used quantitative autoradiography to examine the distribution of thyrotropin-releasing hormone (TRH) receptors in the central nervous system (CNS) of the African lungfish Protopterus annectens. We found that the distribution of TRH receptors throughout the CNS of the lungfish was heterogeneous with the highest concentrations (500-800 fmol/mg protein) in the olfactory bulb and telencephalon, moderately high concentrations (200-500 fmol/mg protein) in the diencephalon, and moderate (50-200 fmol/mg protein) to low (less than 50 fmol/mg protein) concentrations in the brainstem and spinal cord. Except for the motor nuclei of the cranial nerves and spinal cord, TRH receptors were concentrated in the acellular regions. In the telencephalon and diencephalon, the receptor density was inversely related to cellular density. These results provide a neuroanatomic and neuropharmacologic basis for further investigations of TRH in the African lungfish.

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The development of the saccus endolymphaticus in Rana temporaria Linné

Whiteside

1922

Am. J. Anat.

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Resumen por la autora, Beatrice Whiteside.El desarrollo del sac0 eildolinfjtico de Rana temporaria LinnB.Este trabajo trata del desarrollo del sac0 endolinffitico de la rana desde la 6poca en que aparece esta estructura hasta que adquiere la forma hallada en el adulto. La autora ha escojido la raiia porque cn este animal el sac0 es mfis grande y complicado de forma que en cuslquier otro vertebrado investigado hasta el presente. La primera parte del trabajo consiste en una descripcidn de 10s estados sucesivos del desarrollo con especial referencia a la histologia de la estructura mencionada y a su situactihn respecto a Ins meninges espinales. Despues pass a describir la topografia e histologia del drgano despu6s de haber completado su desarrollo. La segunda parte del trabajo estfi dedicada a una descripcibn de la cstrcutrua anat6mica clel sac0 en todas las clases de 10s vertebrados.l'ranslatioii by Joe6 F. h'onidcs Corriell >ltdiral College, hew York

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The central nervous system of Protopterus annectens

Cited by 15 publications

References 0 publications

An immunohistochemical study of the telencephalon of the african lungfish, Protopterus annectens

An immunohistochemical study of the telencephalon of the african lungfish, Protopterus annectens

Autoradiographic distribution of thyrotropin‐releasing hormone receptors in the african lungfish Protopterus annectens

The development of the saccus endolymphaticus in Rana temporaria Linné

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