HART 



30 40 50 60 



TIME IN MINUTES 



Figure 18. First portion of the figure demonstrates the course of rectal and 

 intracutaneous tail temperature during body heating and consequent vasodilation 

 in a normal undisturbed subject. Subsequently the tail is cooled down, and nerve 

 blocked. Body heating is reapplied but the tail vasodilation and the consequent heat 

 loss is prevented and a rapid increase in rectal temperature is seen. 



238 



