Pflügers Archiv

, Volume 370, Issue 1, pp 107–109 | Cite as

Thermosensitivity of preoptic neurones in a hibernator at high and low ambient temperatures

  • E. Speulda
  • W. Wünnenberg
Letters and Notes


The effect of ambient temperature on the thermosensitivity of preoptic neurones was studied in euthermic golden hamsters. At skin temperatures (Tsk) of 20°C, preoptic units were still responsive to hypothalamic temperatures (Thy) below 10°C, while at Tsk=36°C these neurones became inactive at Thy=15°C on the average. These studies suggest that thermoreceptive preoptic neurones, influenced by a high activity of cutaneous cold-receptors, are capable of sensing core temperatures even in deep hibernation.

Key words

Temperature regulation Hibernation Preoptic region Thermosensitive neurones Skin temperature 


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Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • E. Speulda
    • 1
  • W. Wünnenberg
    • 1
  1. 1.Lehrstuhl für ZoophysiologieZoologisches Institut der Universität KielKielFederal Republic of Germany

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