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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Anatomy and embryology 127 (1968), S. 221-231 
    ISSN: 1432-0568
    Keywords: Marginal glia ; Superficial nerve cells ; Brain stem ; Cat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An Paraffinschnitten durch perfusionsfixierte Gehirne von erwachsenen Katzen werden in der Glia marginalis des Hirnstamms unterschiedlich gebaute Bezirke beschrieben. Es wird gezeigt, daß über dem Nucleus paragigantocellularis und über dem Ncl. “z” swischen den Fasern der Glia marginalis Nervenzellen liegen. Über dem erstgenannten Kern stellen diese Zellen möglicherweise das morphologische Substrat der chemosensiblen Felder dar, die durch die physiologischen Untersuchungen von Loeschcke, Mitchell u.a. bekannt geworden sind.
    Notes: Summary In the marginal glia covering the brain stem of the cat, regional differences are described in paraffin sections of brains which had been fixed by perfusion of Bouin's fluid. It is shown that between the glia fibres covering the nucleus paragigantocellularis and the nucleus “z” there are nerve cells. It is suggested that in the region of the nucleus paragiganto-cellularis these cells are the morphological substrate of a chemosensible zone described in physiological experiments by Loeschcke, Mitchell and others.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract A lesion in the dorsoposterior part of the rat brain septum is known to exert an inhibitory effect on the delayed skin hypersensitivity and incorporation of radiolabeled thymidine into the lymphoid organs. To determine whether distinct properties of macrophages will also be modulated by this type of injury, we have focused upon the monitoring of expression of sugar receptors (lectins). In this study we show a reduction in the number of macrophages expressing carbohydrate-binding sites for asialoglycoproteins (β-D-galactoside), α-D-mannoside and α-D-mannoside-6-phosphate in spleen macrophages after the lesion of the dorsoposterior septum of the brain in the rat. The number of ED-1+ macrophages was not influenced. The intraperitoneal injection of beads prepared from the copolymer of 2-hydroxyethyl methacrylate with dimethyl aminoethyl methacrylate (30 wt %) elevated significantly the number of ED-1+ spleen macrophages and number of macrophages with binding site(s) recognizing asialoglycoproteins and α-D-mannoside-6-phosphate, respectively. These results indicate that a foreign-body reaction appears to be able to mediate a phenotypic restoration of lectin expression by spleen macrophages altered by the brain lesion. It can be suggested that, for example, a probable production of cytokines by the inflammatory cells colonizing the implanted beads plays a role in this process. © 1999 Kluwer Academic Publishers
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2072
    Keywords: Locus ceruleus ; Leucine incorporation ; Stress ; Diazepam
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Incorporation of 4,5-3H leucine into neurons of locus ceruleus, neurons of the terminal principal nucleus of the trigeminal nerve and spinal motoneurons in stressed rats (S group), animals, stressed after a single injection of diazepam (DS group), and controls (C group) was studied by quantitative autoradiography. Both in the S and DS groups the planimetrically measured neuronal areas were bigger than in the C group of spinal motoneurons and trigeminal neurons. Stress, however, had no effect on the size of neurons in locus ceruleus. No significant differences of grain density among C and S group were found in the three investigated neuronal groups; diazepam pretreatment (DS group), however, increased markedly the grain density in all types of neurons investigated.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 88 (1968), S. 113-125 
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung An Paraffinschnitten durch perfusionsfixierte Gehirne von erwachsenen Katzen werden in der Wand des Aquaeductus cerebri zwei von cranial nach caudal verlaufende Gliafaserbündel beschrieben, deren eines in das Velum medullare anterius einstrahlt, während das andere Anschluß an ein Faserbündel gewinnt, welches in der Seitenwand des IV. Ventrikels verläuft. — Es wird gezeigt, daß im Boden des IV. Ventrikels am Eingang in den Recessus lateralis sowie im Boden des gesamten Recessus lateralis unmittelbar unter dem Ependym einzeln gelegene Nervenzellen vorkommen. Diese bisher unbekannten Zellen werden als ein flächenhaft ausgebreitetes Kerngebiet mit enger Beziehung zum Ventrikelsystem angesehen.
    Notes: Summary In paraffin sections through the brains of adult cats two thick bundles of glia fibres are shown to be running in the cranio-caudal direction within the wall of the aqueductus cerebri. One of the bundles enters the velum medullare anterius whereas the other is continuous with a bundle of glia fibres that runs within the lateral wall of the IVth cerebral ventricle. — In the floor of the IVth ventricle near the entrance to the lateral recess and in the floor of the entire lateral recess nerve cells are shown to occur immediately underneath the ependyma. These cells, which so far have not been described, are thought to constitute an extremely thin nucleus having a special relationship to the ventricular system.
    Type of Medium: Electronic Resource
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