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Pflügers Archiv

, Volume 321, Issue 3, pp 233–241 | Cite as

Studies on the ascending pathways from the thermosensitive region of the spinal cord

  • W. Wünnenberg
  • K. Brück
Article

Summary

In young guinea pigs the ascending pathways from the spinal thermosensitive region were studied by means of 1. microelectrode recording and 2. micro-electrocoagulation. In the first series of studies, impulse frequency was recorded from single units of the spinothalamic tract which responded to a temperature rise in the spinal segments C5-T2 with an increase of discharge frequency. At a spinal cord temperature of 38–39° C these units showed a firing rate of 1–5 imp./sec; local heating of the spinal cord (dT/dt=0.1° C/sec) to 40–41° C caused an increase in discharge frequency to 20–25 imp./sec. The mean static impulse frequency was 3 imp./sec at a spinal cord temperature of 39° C, and 10 imp./sec at a spinal cord temperature of 42.5° C.

In the second series of studies bilateral RF-coagulations were carried out in different sites of the diencephalon. These experiments showed that the ascending fibres from the spinal thermosensitive region connect the thermosensitive spinal region with a hypothalamic “temperature control centre”.

Key-Words

Temperature Regulation Control of Shivering Central Thermosensitive Structures Spinal Cord Diencephalon 

Schlüsselwörter

Temperaturregulation Steuerung des Kältezitterns zentrale thermosensitive Strukturen Rückenmark Zwischenhirn 

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Copyright information

© Springer-Verlag 1970

Authors and Affiliations

  • W. Wünnenberg
    • 1
    • 2
  • K. Brück
    • 1
    • 2
  1. 1.Physiologisches Institut der Universität MarburgMarburgGermany
  2. 2.Universität Gießen, Physiologie IIGießen

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