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MARTIN G. LARRABEE AND PAUL HOROWICZ 



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Fig. 6. Electrode assembly for stimulating and recording from excised rat ganglia 

 while measuring glucose and lactate metabolism. This assembly fitted into the appa- 

 ratus shown in Figure 5, in place of the stopper and wire. Left: The entire assembly. 

 Scale at top is numbered in centimeters. Right: Enlarged view of the electrodes, im- 

 bedded in glass insulating sleeve. The two lower electrodes were for stimulation, the 

 middle for ground connection, and the upper two for recording. Scale on the left in 

 millimeters. 



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20 - 



15 - 



10 



5 - 



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HOURS HOURS 



Fig. 7. Effects of activity on rates of glucose consumption and lactate production 

 in two rat ganglia. Supramaximal stimulation was applied to the preganglionic nerve 

 at a frequency of 15 /sec. during periods indicated at the top. 



