Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Electronic Resource  (2)
  • 25.70.−z  (1)
  • Migrationsstörungen  (1)
  • 1
    ISSN: 1434-601X
    Keywords: 21.10.−K ; 21.60.−n ; 25.70.−z ; 27.70.+q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The strongly shape driving πh9/2[541]l/2− configuration with α=+1/2 exhibits some anomalous, and so far unexplained, features concerning the crossing frequency, ħωc, the aligned angular momentum, ix, and interaction strength, at the alignment of the first pair of i13/2 quasineutrons in several odd-Z rare earth-nuclei. The h9/2[541]1/2− and h11/2[523]7/2− bands have been studied in the stably deformed rare-earth nucleus163Tm to investigate these features. A difference in band crossing frequency of ∼ 80 keV between the two bands is found. Rotational bands built on these two configurations have been found to cross in the spin range I=25/2–29/2 ħ. Theγ-decay pattern between the two bands is established in the crossing region and analysed in terms of a moderate shape difference between them. A theoretical estimate of the size of the interaction strength between the two bands is presented and compared to the experimental value. The observed band structure in163Tm is very similar to that of167Lu which has 2 protons and 2 neutrons in addition. This observation is discussed in relation to the similarity of the yrast bands of the two even-even “core” nuclei162Er and166Yb, for which theγ-transition energies are identical within ∼0.2 keV below the vi13/2 crossing.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Hirnentwicklung ; Epilepsie ; Kortikale Malformationen ; Migrationsstörungen ; Pathophysiologie ; Key words Brain development ; Cortical malformation ; Epilepsy ; Migration disorder ; Pathophysiology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Cortical dysgenesia are a heterogenous group of genetic or acquired disturbances of cortical development which, due to the enormous progress in modern neuroimaging techniques, are increasingly recognized in association with a variety of clinical disorders. The spectrum of clinical manifestations, depending on type and extent of the alterations, includes severe mental retardation and epilepsy as well as neuropsychological deficits and some psychiatric disorders. Although pathogenesis and pathophysiology of cortical dysgenesis are still not fully understood, the recent discovery of responsible genes, growth factors, neurotransmitters, and exogenous factors sheds light on elementary mechanisms. The development of animal models mimicking different types of human cortical malformations helped to increase further the understanding of functional consequences of focal cortical dysgenesis. Several studies on these models reveal widespread alterations of cortical connectivity and excitability which are probably of crucial importance in different clinical disorders.
    Notes: Zusammenfassung Kortikale Dysgenesien umfassen eine heterogene Gruppe von angeborenen und erworbenen Störungen der Hirnrindenentwicklung, die durch die enormen Fortschritte der modernen bildgebenden Verfahren immer häufiger im Zusammenhang mit verschiedenen Krankheitsbildern diagnostiziert werden. Das Spektrum dieser Krankheitsmanifestationen reicht dabei je nach Typ und Ausmaß der Veränderungen von schweren mentalen Retardierungen über epileptische Anfallsleiden bis hin zu isolierten neuropsychologischen Defiziten und psychiatrischen Erkrankungen. Obwohl Pathogenese und Pathophysiologie der kortikalen Dysgenesien derzeit noch weitestgehend ungeklärt sind, konnten in den vergangenen Jahren durch die Entdeckung einiger verantwortlicher Gene, Wachstumsfaktoren, Neurotransmitter und exogener Faktoren eine Reihe von pathophysiologischen Entstehungsmechanismen aufgeklärt werden. Die Entwicklung von tierexperimentellen Modellen, die verschiedene Typen menschlicher kortikaler Malformationen widerspiegeln, ermöglichte darüber hinaus ein besseres Verständnis der funktionellen Auswirkungen fokaler kortikaler Dysgenesien. Dabei zeigte sich, dass fokale kortikale Dysgenesien zu ausgedehnten Veränderungen der kortikalen Konnektivität und Errregbarkeit führen, die bei der Entstehung der verschiedenen Krankheitsbilder vermutlich von entscheidender Bedeutung sind.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...