CLARK, G. 
Figure 11. A diagram of a parasagittal section (left) through 
the preoptic area and the hypothalamus of the goat. The cross- 
hatched area marks the region where electrical stimulations caused 
polypnea, vasodilatation in the ears, and inhibition of shivering. 
A diagram ofa horizontal section (right) of the preoptic ^rea and 
the hypothalamus of the goat at a level about 2 mm ventral to the 
anterior commissure. Filled circles mark points where electrical 
stimulation caused polypnea, vasodilatation in the ears and in- 
hibition of shivering. Open circles mark the localization of adjacent 
points where electrical stimulation was ineffective in these resjaects. 
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