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  • 2000-2004  (1)
  • 1970-1974  (1)
  • Frog-Vestibulospinal System  (1)
  • PACS: 21.10.Hw Spin, parity, and isobaric spin – 21.10.Tg Lifetimes – 21.60.-n Nuclear-structure models and methods – 27.50.+e 59 ≤ A ≤ 89  (1)
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  • 2000-2004  (1)
  • 1970-1974  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Vestibulospinal effects on hindlimb motoneurons of the frog (1974)
    Springer
    Pflügers Archiv 348 (1974), S. 211-223 
    Details
    ISSN: 1432-2013
    Keywords: Frog-Vestibulospinal System ; Spinal Motoneurons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Field and intracellular potentials were recorded in the lumbar spinal cord of the frog following stimulation of the anterior branch of the vestibular nerve and vestibular nucleus. The field potential recorded in the motoneuron pool after VIIIth nerve stimulation consisted of two presynaptic positive-negative potentials (latencies 1.7 and 2.6 msec) followed by a slow negative wave. The latency of the first presynaptic field potential was only 0.6 msec longer than the presynaptic field potential evoked by stimulation of the vestibular nucleus; it is suggested that electrotonic coupling in the vestibular nuclei is responsible for the fast vestibulospinal transmission. Whereas VIIIth nerve stimulation produced EPSPs in both flexor (peroneal) and extensor (tibial) motoneurons, IPSPs were found only in extensor motoneurons. The functional implication of these findings was discussed. Comparison of PSP latencies with the extracellular presynaptic field potentials generated by VIIIth nerve or nucleus stimulation indicated that EPSPs were produced by the excitatory action of vestibulospinal axons on motoneurons. The longer latencies of the vestibular induced IPSPs suggested that they were generated indirectly by inhibitory spinal interneurons. Preliminary experiments on the interaction of segmental and vestibular induced PSPs suggest that the latter are generated close to the soma of motoneurons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00587412
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Is the 4.742 MeV state in 88Sr the 1− two-phonon state? (2000)
    Springer
    The European physical journal 7 (2000), S. 15-18 
    Details
    ISSN: 1434-601X
    Keywords: PACS: 21.10.Hw Spin, parity, and isobaric spin – 21.10.Tg Lifetimes – 21.60.-n Nuclear-structure models and methods – 27.50.+e 59 ≤ A ≤ 89
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: A nuclear resonance fluorescence experiment on 88Sr has been performed with bremsstrahlung of 6.7 MeV endpoint energy. The γ-ray linear polarisation has been measured with a EUROBALL CLUSTER detector used as a Compton polarimeter. The results indicate positive parity for the J= 1 state at 4.742 MeV in 88Sr, in contrast to the previous interpretation as a 1− two-phonon (2+ 1⊗ 3− 1) state and in conflict with the predictions of the quasiparticle-phonon model. On the basis of such calculations the 1+ state at 3.486 MeV may be considered as the 1+ 1 one-phonon state and the very strong 1+ 1→ 0+ 1 deexcitation as proton spin-flip 2p1/2→ 2p3/2 transition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500050004
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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