HENSEL, H. 
DR. HEMINGWAY: It does not take much of a voluntary move- 
ment, just sitting up will increase the oxygen consumption rate 
twenty-five to fifty per cent, just a very slight movement and that 
is the difference. You were speaking about the difference between 
dogs and cats. A well-trained dog will lie quietly and will not leave 
the room. 
DR. HENSEL: In many cases the cats were lying on the bottom 
of the chamber very quietly, just like a well-trained dog. 
DR. STUART: Thesethermodes were implanted into the anterior 
hypothalamus. Have you ever implanted any into the posterior 
hypothalamus? 
DR. HENSEL: Yes, we did, but we did not see any considerable 
effect. We saw it in the anterior hypothalamus, but I must say we 
did not make very many experiments as yet in the posterior hypo- 
thalamus. I would not draw a definite conclusion, but we failed in 
getting an effect as yet. 
DR. LIM: In terms of oxygen consumption and differential 
cooling of the body, we found that there are two things we have to 
furnish. One is the onset of shivering; and in the onset of shivering, 
the peripheral mechanism is very important in the initiation of 
shivering, but in the maintenance of shivering, a central temperature 
is almost three times more important than the skin temperature in 
terms of oxygen consumption. 
DR. HENSEL: Yes. 
DR. CLARK: When you say "anterior hypothalamus", just how 
far anterior? Would it be over the optic chiasma? 
DR. HENSEL: Yes, the position was above the optic chiasma. 
But you see, even if you have a very accurate position of the ther- 
mode, you have a temperature field around the thermode. 
DR. CLARK: It would not get back to the tuberal region? 
DR. HENSEL: No. 
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