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  • Dorsal horn neurons  (1)
  • PACS: 61.10.Nz; 68.65; 71.20.T; 81.05.Tp  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Systemic lidocaine induces expansion of the receptive field of spinal dorsal horn neurons in rats (1998)
    Springer
    Experimental brain research 118 (1998), S. 431-434 
    Details
    ISSN: 1432-1106
    Schlagwort(e): Key words Lidocaine ; Dorsal horn neurons ; Nociception ; Receptive field ; Spinal cord
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract  The effect of intravenous administration of the local anaesthetic lidocaine (1, 3 or 5 mg/kg) on the responsiveness and size of the cutaneous receptive fields of 18 lumbar dorsal horn neurons was examined in intact urethane-anaesthetized rats. Lidocaine induced expansion of the receptive field in the majority of neurons examined, particularly after the two higher doses. The expansion occurred usually within 10 min after lidocaine injection and the effect was reversible. Lidocaine also altered the responsiveness of dorsal horn neurons to peripheral mechanical stimulation. The responses of wide-dynamic-range neurons to noxious pinch were usually inhibited by lidocaine. However, some low-threshold neurons started to react to noxious mechanical stimulation and some high-threshold neurons started to respond to innocuous brushing after lidocaine injection. The present results show that moderate doses of systemic lidocaine induce complex changes in the excitability of dorsal horn neurons, including an increase in the size of the receptive field and altered response characteristics to mechanical stimulation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002210050298
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Investigation of ytterbium fulleride compounds (2000)
    Springer
    Applied physics 70 (2000), S. 223-225 
    Details
    ISSN: 1432-0630
    Schlagwort(e): PACS: 61.10.Nz; 68.65; 71.20.T; 81.05.Tp
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract. We have synthesized the ytterbium fulleride compounds YbxC60 (x=1–6) at a range of lower temperature (530 °C–570 °C). Except for the nominal composition Yb3C60 compound, which has been reported in the references, we also obtained a new phase Yb6C60, whose structure is orthorhombic with space group P21212 and unit cell parameters a=21.28 Å, b=20.13 Å and c=15.89 Å. The YbxC60 compounds are sensitive to oxygen, the samples exposed in air convert to an amorphous phase and Yb2O3 compound.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003390050037
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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