JANSKY 



+3 

 + 2 

 + 1 

 

 -I 

 -2 

 -3 



30*C O 



200 



100 



BODY TEMP CHANGE IN ACTIVITY 



SPONTANEOUS ACTIVITY 



-10 



Figure 7. Upper panel: change in colonic temperature from initial resting state 

 in rats running at 140(f cm/min in a treadmill for 30 minutes at various tempera- 

 tures. Symbols are for groups of 8 rats acclimated for 4 to 8 weeks to 6 C, (•) 

 and to 30 C (0). The rats were exposed to each temperature for 10 min before start 

 of run. Lower panel: me£(h spontaneous wheel activity of 4 rats acclimated to 6 C 

 (•) and 8 rats acclimated to 30 (0) tested twice at each temperature for one hour 

 periods. Total range of variation shown by shaded areas. Same rats used in both 

 tests show lowering of spontaneous activity at both high and low temperatures, 

 especially those which cause hypotherma during forced exercise. Presented by 

 J. S. Hart. 



198 



