Summary
Thermodes were chronically implanted in the epidural space of 3 dogs. The dogs had learned to turn on a fan or infra-red lamps by making a voluntary head movement, in a climatic chamber. Their thermoregulatory behavior was therefore quantitatively measured.
Thermal stimulation of the spinal cord was achieved by perfusing water through the spinal thermode.
In a warm environment, spinal cord heating produced an increased behavioral fresh air request. On the other hand, spinal cord cooling had no effect upon behavioral fresh air request.
In a cold environment, results obtained with one dog showed a decreased behavioral infra-red request during spinal cord heating. Again, thermoregulatory behavior was not changed by spinal cord cooling.
These experiments demonstrate the existence of a warm sensitivity in the spinal cord capable of triggering thermoregulatory behavioral response. No evidence was found for a corresponding cold sensitivity.
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Travail effectué grâce à l'aide financière du Centre National de la Recherche Scientifique (C.N.R.S.) et de l'institut National de la Santé et de la Recherche Médicale (I.N.S.E.R.M.).
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Cormarèche-Leydier, M., Cabanac, M. Influence de stimulations thermiques de la moëlle épinière sur le comportement thermorégulateur du chien. Pflugers Arch. 341, 313–324 (1973). https://doi.org/10.1007/BF01023673
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DOI: https://doi.org/10.1007/BF01023673