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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 315 (1978), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'agénésie du corps calleux en elle-même est de peu d'importance du point de vue clinique. De ce fait, les symptômes psychomoteurs qui l'accompagnent fréquemment sont probablement causés par des anomalies cérébrales associées. Parmi celles-ci, les plus courantes sont les lésions encéphaloclastiques et les malformations dûes à des défauts de migration. La fréquence avec lesquelles on les rencontre, en fait une partie importante du syndrome, en particulier quant à l'interprètation des symptômes et des signes diagnostiques par exemple les caractéristiques anatomiques et pneumoencéphalographiques du cerveau en cas d'agénésie du corps calleux. L'image d'agénésie du corps calleux “pure” (c'est-à-dire isolée) peut donc être considérablement modifiée ou compte-tenu des signes isolés, limitée par les manifestations des lésions cérébrales associées. On peut donc attribuer aux lésions associées la microcrânie et la microencéphalie, les malades présentant une agénésie du corps calleux “pure” ayant un crâne et un cerveau de taille normale. Une hypoplasie plus limitée et plus sélective due à une destruction localisée et à des malformations est plus répandue. A la fois, les anomalies corticales et les lésions de la substance blanche accentuent le défaut du corps calleux par l'intermédiaire d'une hypoplasie des faisceaux, par une diminution de volume du faisceau longitudinal et par l'ascension des ventricules latéraux-signes qui tous sont à considérer pour le diagnostic d'agénésie du corps calleux. Ces lésions peuvent être responsables de signes supplémentaires que l'on ne retrouve pas dans une agénésie du corps calleux “pure” telle que l'hypoplasie du tronc cérébral, consécutive à une déficience du faisceau corticospinal, une dilatation et une déformation ventriculaire. Par conséquent, les lésions associées sont d'une importance capitale du point de vue clinique et diagnostic.
    Abstract: Zusammenfassung Ausführliche Untersuchungen zu dieser Frage, die die Bedeutung der begleitenden Läsionen für den klinischen und diagnostischen Standpunkt herausstellen.
    Notes: Summary The callosal defect (CD) is of little clinical importance in itself. Therefore, the psychomotor symptoms frequently accompanying it are probably caused by associated brain anomalies. The more common of these are encephaloclastic lesions and malformations based on retarded migration. The frequency with which they occur makes them an important part of the syndrome, especially in regard to the interpretation of the symptoms and diagnostic signs, e.g. the anatomical and pneumoencephalographic appearances of the brain in CD. The picture of “clean” (i.e. uncomplicated) CD may thus be considerably modified or, with respect to isolated features, imitated by the effects of the associated brain lesions. Thus microcrania and microencephaly can be explained on the basis of the associated lesions, patients with “clean” CD having a skull and brain of normal size. A more limited and selective hypoplasia due to focal destruction and malformations is more common. Both cortical abnormalities and lesions of the white matter accentuate the callosal defect by way of tract hypoplasia, reduction in size of the longitudinal bundle and dorsal extension of the lateral ventricles-all features of importance in the diagnosis of CD. These associated lesions may be responsible for additional features not seen in clean CD such as brainstem hypoplasia due to corticospinal tract deficiency, ventricular widening and deformity. Consequently the associated lesions are of great importance from the clinical and diagnostic viewpoints.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] We have previously reported a large Danish pedigree with autosomal dominant frontotemporal dementia (FTD) linked to chromosome 3 (FTD3). Here we identify a mutation in CHMP2B, encoding a component of the endosomal ESCRTIII complex, and show that it results in aberrant mRNA splicing in tissue ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 24 (1973), S. 232-243 
    ISSN: 1432-0533
    Keywords: Progressive Multifocal Leukoencephalopathy ; CNS Demyelination, Progressive ; Leukemia ; Papovavirus in CNS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In 7 cases of progressive multifocal leukoencephalopathy (PML), five with papova-like viral inclusions, the clinical and neuropathological features varied both within the group and in relation to the accepted, uniform pattern of the disease. Two were „spontaneous” and unrelated to any disease. One ran a protracted, remitting course, and in another the disease appeared stationary. From different points of view the differential diagnosis of multiple sclerosis was considered in these two cases. Two or three were subclinical, a variety which may be more common than hitherto recognized. Pronounced asymmetry in the distribution of lesions appears to be diagnostic interest in this disease, which would be expected to involve the brain in a generalized manner. The occurrence of atypical astrocytes, regarded as a striking feature of old lesions, was unimpressive except in two cases. These two cases on the other hand showed a glial reaction, in some respects simulating a glioma. This was deemed of particular interest in connection with an infection with the papova-group of viruses which is used experimentally to induce tumour. Recent results of virological research in this field can be expected to provide new and better means to study the virus, its occurrence in man and its possible role in PML.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 37 (1977), S. 313-314 
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 30 (1972), S. 315-324 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Aging neurons accumulate lipofuscin pigment granules which appear to be secondary lysosomes of the residual body variety. The biological significance of the residual bodies is debated. They were here studied with the aim of testing a hypothesis that the membranes surrounding these granules might be more vulnerable than the membranes around “younger” types of lysosomes. For this purpose large motor neurons of young and old rats were compared with respect to lysosomal membrane latency, using a modified Bitensky lysosomal lability test. Utilizing successively increasing incubation times, the lysosomes of old neurons, in particular the residual bodies in polar aggregates of old neurons—presumed to represent lipofuscin pigment granules—were found to have a clearly reduced latency in comparison with lysosomes of young neurons. These findings support the notion that the residual bodies are more fragile than “younger” lysosomes.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 34 (1973), S. 333-342 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A modified sulfide-silver method was used to demonstrate tissue bound heavy metals in the rat brain at various ages. An accumulation of sulfide-silver positive material was found to accompany aging, indicating heavy metal accumulation. This was verified by quantitative analysis using atomic absorption spectrophotometry. Iron appears to be the most important heavy metal. Besides differences between various ages, regional variations in heavy metal contents could constantly be shown. The heavy metals appear, at least in part, to be located in lysosomes. A heavy metal influence on the lysosomal membrane permeability is discussed.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 29 (1972), S. 140-146 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Lysosomes of embryonic rat fibroblasts cultivated in vitro normally contain heavy metals, as shown with a modified sulfide-silver method (SSM). Cultures which received lead added to the cultivation medium showed an enhanced SSM-positivity. However, since the SSM demonstrates several different heavy metals the sulfides of which are weakly soluble in water, it was not possible to distinguish between naturally occurring heavy metals—largely iron—and added lead (supposed to have been taken up by the cells). By treating the cells with a 0.2 M TCA solution after an initial exposure to HS− it was possible to dissolve FeS without affecting the PbS to any noticeable extent. When subsequently the development process of the SSM was applied to the cells, no metals could be demonstrated in the control cells whereas those exposed to lead showed presence of granules, most of which were identical with lysosomes as visualized with a Gomori type reaction. A lysosomal uptake of lead could thus be demonstrated with the modified SSM when combined with a simple dissolving process.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A Swedish family with two generations suffering from presenile dementia with an unusually severe Alzheimer encephalopathy was first reported in 1946. The hypothesis that the disease was inherited through a dominant gene is strongly supported by the follow-up 50years later of three additional generations and molecular genetic findings of a novel presenilin-1 gene mutation in the family. The pedigree contains six cases with well-documented dementia in four consecutive generations. The Alzheimer encephalopathy was unusually severe in the three cases studied post-mortem, with a pronounced involvement of the central grey structures, such as the claustrum, the nuclei around the third ventricle, the central thalamic nuclei and the brain stem. There were no vascular lesions and little amyloid angiopathy. All six affected cases showed the typical temporoparietal symptom pattern and other core symptoms of Alzheimer’s disease, such as logoclonia, myoclonic twitchings and major motor seizures. Other predominant features were psychomotor slowness, increased muscular tension, a stiff stooped gait and a rapid loss of weight. The symptom pattern is convincingly explained by the consistent and severe involvement of cortical and central grey structures and is probably linked to the presenilin-1 gene mutation.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 10 (1968), S. 159-161 
    ISSN: 1432-0533
    Keywords: Cerebral malformation ; Turner's syndrome ; Cortical dysplasia ; Chromosomal anomalies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Ein 16 Jahre altes Mädchen mit Turner-Syndrom starb infolge wiederholter Blutungen aus einem Medulloblastom. Sie war geistig mäßig rückständig und hatte Anfälle von petit mal-Typ. Das Gehirn zeigte eine angeborene Mißbildung, bestehend aus leichter corticaler Dysplasie und Heterotopien der grauen Substanz. Dieser Befund is unseres Wissens bisher beim Turner-Syndrom nicht bekannt, möglicherweise deswegen, weil derart geringe Veränderungen leicht übersehen werden können. Es erhebt sich die Frange, ob die Hirnmißbildung in diesem Fall einem zufälligen Zusammentreffen entspricht, oder dem Mißbildungsmuster des Turner-Syndroms zugehört.
    Notes: Summary A 16 year old girl with Turner's syndrome died owing to repeated bleedings from a medulloblastoma. She was slightly mentally retarded and had attacks of petit mal type. The brain showed a congenital malformation classified as slight cortical dysplasia and gray matter heterotopias. This, as far as we know, has hitherto not been diagnosed in Turner's syndrome, possibly because such minor changes are easily overlooked. The question ist raised whether the cerebral malformation was coincidental in this case or part of the malformation pattern in Turner's syndrome.
    Type of Medium: Electronic Resource
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