Arctic Aeromedical Laboratory. Aerospace Medical Division, Air Force Systems Command. Fort Wainwright, Alaska. Technical documentary report TDR-62-15. 17 p.
Department of Physiology, School of Medicine, University of California at Los Angeles
Source
Arctic Aeromedical Laboratory. Aerospace Medical Division, Air Force Systems Command. Fort Wainwright, Alaska. Technical documentary report TDR-62-15. 17 p.
The effects of decerebration and decortication on the metabolic intensity of shivering in cats were determined. There was neither shivering nor an appreciable rise in the oxygen consumption rate of chronic decerebrate cats during rapid cooling. The intermittent somatomotor activity that was induced by rapid cooling was occasionally tremulous but it was also evoked by rapid warming and was absent during slow cooling and warming. This suggested that the motor activity of decerebrate cats during rapid cooling was more a generalized avoidance response to nociceptive stimulation than a temperature regulating mechanism. In decorticate cats shivering was depressed three days after surgery, the mean shivering to nonshivering ratio in oxygen consumption rate being 1.6 ± 0.12 (S. D. ), while the same ratio before operation was 2.6 ± 0.48 (S. D. ). One month after decortication shivering had returned to its pre-operative intensity. This suggested that the net telencephalic influences on shivering could hardly be suppresive, as suggested by some earlier investigators.